Sekonic FLASH MASTER L-358 Opearting Manual

Congratulations on your purchase of a

Sekonic Flash Master L-358 Exposure Meter.

This meter provides a wide range of functions that correspond with most
manufacturers camera settings in all formats, which will satisfy professionals as
well as serious enthusiasts.
Its sealed housing and controls make it water and moisture resistant.
Yes, you can use it in the rain, but it is not an underwater meter.
Its large LCD display makes readings easy and lights up automatically in dark
surroundings.
In order not to crowd the controls, four functions which are less frequently used,
are confined to DIP switches, located in the battery compartment.
Because of its many features, the L-358 requires this rather extensive manual.
But since you will never use them all at the same time, once you have learned all
about it, it is simple and its use will become second nature.
The Flash Master L-358 has undergone extensive quality controls at every step
of manufacture. Please read this instruction manual thoroughly, to be able to take
advantage of its many features and to obtain the long service life it is designed
for.
Thank you for your confidence in Sekonic.

ENGLISH

Table of Contents

1. Parts Designation ................................................................................................................ 1

2. Explanation of the Liquid Crystal Display (LCD) .................................................................. 2-3

3. Before Using ........................................................................................................................ 4-6

1. Attach the strap ......................................................................................................... 4

2. Inserting the battery ................................................................................................... 4

3. Checking battery capacity ......................................................................................... 4

4. Replacing battery during measurement

or when using the memory function .......................................................................... 5

5. Auto Power Off function............................................................................................. 5

6. Setting main ISO film speed ...................................................................................... 5

7. Setting second ISO film speed (ISO 2) ..................................................................... 5

8. Mesurement Lock and Measurement Lock Off .......................................................... 6

4. Basic Operation ................................................................................................................... 7-10

1. Setting measuring mode ........................................................................................... 7

2. Setting DIP switches .................................................................................................. 8

3. When set for incident light ......................................................................................... 9

4. When set for reflected light (spot metering) .............................................................. 10

5. Measurment ........................................................................................................................ 11-20

1. Measuring Ambient Light ........................................................................................... 11-14

1-1 Shutter Speed Priority mode ........................................................................... 11

1-2 Aperture Priority mode .................................................................................... 12

1-3 EV mode ......................................................................................................... 13

1-4 Cinematography .............................................................................................. 14

2. Measuring Flash Light ............................................................................................... 15-22

2-1 Cord Flash mode ............................................................................................. 15-16

2-2 Auto Reset Cordless Flash mode ................................................................... 16-17

2-3 Cord Multiple Flash (cumulative) mode ........................................................... 18-19

2-4 Cordless multiple Flash (Cumulative) mode ................................................... 19-20

6. Advanced Functions ............................................................................................................ 21-32

1. Memory function ........................................................................................................ 21

2. Averaging function ..................................................................................................... 22

3. Brightness Difference function................................................................................... 23-24

4. How to use the L-358 as an incident Illuminance (LUX or FC) Meter ....................... 25

5. Compensating function .............................................................................................. 26

5-1 How to change Exposure compensation ......................................................... 26

5-2 How to change Calibration compensation ....................................................... 26

6. Flash analyzing measurement function ..................................................................... 27

7. Wireless flash radio triggering function ..................................................................... 28-30

7. Accessories ........................................................................................................................ 31-32

8. Technical Data ..................................................................................................................... 33-34

9. Safety Guide ........................................................................................................................ 34

10. Care and Maintenance ........................................................................................................ 35

!4 Lock lever

1. Parts Designation

q Lumisphere retracting ring

w Lumisphere

!3 Mini light receptor

outlet

!2 Power button (ON/OFF switch)

!1 ISO 1 button

!0 Mode set button

o Strap eyelet

POWER

ISO 1

MODE

FLASH MASTER

L-358

!8 DIP Switches

AVE./∆EV

ISO 2

MEMORY

e Liquid Crystal Display (LCD)

r Average /

∆ EV (Brightness Difference) button

t Jog wheel

y ISO 2 button

u Memory button

i Flash synchro terminal

@2 Connector cover

ENGLISH

!5 Measuring button

!6 Battery

Compartment Cover

!9 Battery
Compartment

RT-32
Radio transmitter
module compartment

@0 Synchro Terminal Cap

@1 Strap

!7 Battery Cover Latch

@3 54˚Lumigrid

(for reflected light measurement)

-1-

2. Explanation of the Liquid Crystal Display

9 1 2

8

3
4

7

5

6

NOTE:

For explanation purposes, the display illustrated here shows all icons and readouts
simultaneously. Actual display will never show as above.

Auto Electro-Luminescent Display (EL)

In low light (EV 6 or less), a green backlight will automatically illuminate the entire LCD. When using
the Mini Light Receptor or a Booster (optional accessories) the LCD will be illuminated after measuring,
regardless of the ambient light level.
The LCD will not be automatically illuminated during measuring, or in Cordless Flash mode.
The Electro-luminescent backlight will automatically turn off 20 seconds after last operation.
When using the spot viewfinder attachment (1˚,5˚or 10˚NP Finder) if the light level from the spot
measurement is different from the light level when reading the LCD data,the backlight may not
illuminate the display.
In this case,cover the spot viewfinder attachment with your hand while pressing the mode button to
activate the backlight.

-2-

q Measuring Mode Icons

Ambient (see page 11)
Auto-Reset Cordless Flash (see page 17)
Cord Flash (see page 15)
Wireless flash radio triggering mode (see page 30)

2. Explanation of the Liquid Crystal Display

w ISO Display

Displays ISO film setting
Displays second ISO film setting when ISO 2 button is depressed

e Flash Analyzing indicator

0 % to 100% in 10% increments (percentage of flash in the total exposure)

r +/- Compensation Indicator

Appears when +/- Compensation is set

t Digital aperture value, Aperture Priority, EV Brightness Difference, Average function, EV display

Appears when in Aperture Priority (f/stop) mode (see page 12)
Appears when using brightness difference function (See Page 25)
Appears when using Averaging function (see page 24)
Appears when using EV mode (see page 13)

y Analog Scale

Displays marks at apertures or shutter speed indicating full or half step values for measurement,
memory, average values

u Shutter priority indicator, shutter speed display for still photography or frames per second (f/s) for

cinematography

Appears when below display range
Blinks when under exposed below measurement range
Appears when above display range
Blinks when over exposed above measurement range

Appears when in Shutter Priority (T) mode (see page 11)
Appears when shutter speed is in minutes
Appears when shutter speed is in full seconds
Appears when cine speed is set in frames per second (see page 14)

ENGLISH

i Battery Power Indicator (see page 4)

o Memory / Multiple Flash Indicator Display

Appears when in Multi (cumulative) flash measurement mode and shows the cumulated
number (see page 19)
Appears when reading is memorized and shows the number in memory (see page 23)

-3-

3. Before Using

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8

1. Attach the strap

Attach the Strap @1 by passing the small end loop through the
eyelet o and passing the other end of strap through it.

WARNING

• Please place in a location where an infant cannot reach and accidentally get the strap
wrapped around his neck. There is danger of strangulation.

2. Inserting the battery

1. Requires one 3.0 v CR123A lithium battery.

2. Open the Battery compartment cover latch !7, and re­move the Battery compartment cover !6.

3. Insert the battery, observing the polarity with the +,- marks
in the battery chamber.

4. Align the tabs of the Battery compartment cover with the
notches in the back of the meter, and press down to close
the Battery cover latch.

NOTE:

• To prevent loss of All-weather seal, be careful that dirt does not get stuck on the rubber
seal and that the seal is not damaged.

• Remove battery if meter is not used for an extended period. Batteries can leak and
damage the exposure meter. Dispose of used batteries properly.
If the LCD does not light, check that the battery capacity is sufficient, and check that the
battery positive and negative terminals are not reversed.

• The meter has a connector for a plug-in radio transmitter module.Do not remove the
connector cover unless you are installing the radio module,failure to do so could cause
the electronic circuit board to be exposed to damaging static electricity.

3. Checking battery capacity

• When the Power button !2 is ON, the battery power indicator on the LCD is displayed.
(Displayed) Battery power level is good.
(Displayed) Battery power level is low. Have a spare battery ready.
(Blinking) Replace battery immediately.

Reference:

We recommend you always have a spare battery on hand.

•

•

If the liquid crystal display extinguishes immediately after the display appears when power
is first applied, that is an indication that the battery is dead. Please promptly replace the
battery.

•

A 3 second pause between power on and off is recommended to avoid damage to the
meter.

-4-

3. Before Using

ISO 1

4. Replacing battery during measurement or when using the memory function

1. Always turn the power OFF before replacing batteries. If batteries are removed with the power

ON, measurements and settings in memory can no longer be recalled.

2. If after replacing the battery, or during measurements, strange screens (displays that have not

been set) appear in the LCD, or nothing happens, no matter what button is pushed, remove the
battery and wait at least ten seconds and then replace the battery. This allows the software to
automatically reset.

WARNING:

• Never place batteries in fire, short, disassemble, or heat them. The batteries might break
down, and cause an accident, injury or pollute the environment.

5. Auto Power Off function

1. To conserve battery power, the meter will turn off about twenty minutes after last use.

2. Whether the Auto Power Saving feature turns the power off or the Power button u is pressed,
the settings and measured values remain stored in memory. When the Power button is pressed
again the last settings are displayed.

Reference:

•

The power shuts off automatically after 1 minute when the power button is pressed and held.

ENGLISH

6. Setting main ISO film speed

1. Hold down the ISO1 button !1 and turn Jog wheel t
to select ISO film speed for the film being used.

2. You can also change the ISO film speed after taking
measurements. The new value is automatically
displayed.

7. Setting second ISO film speed

1. This feature is useful when using a second film with

TM

different ISO film speed, using Polaroid

proofing film,
or for exposure correction (when using a filter, close­up photography, etc.).

2. Hold down the ISO 2 button y and turn Jog wheel to
select ISO film speed of the film being used.

3. Once this is set, after taking a measurement, the mea­sured value for the second film speed will be displayed
when the ISO 2 button is depressed.

4. You can also change the second ISO film speed after taking
measurements. The new value is automatically displayed.

ISO 2

-5-

3. Before Using

8. Mesurement Lock and Measurement Lock Off

1. Hold down the Mode set button !0 and ISO1 button !1
and "LOC" will appear to indicate that the settings are
locked. The last measurement is held until the lock is
released, even if the Jog wheel t is accidentally
moved.

However,if the measurement button !5 is pressed,a
new measurement is displayed with the same locked
settings.

2. To release the Measurement lock, perform the same
operation for the Measurement lock, Hold down the
Mode set and ISO1 button and "Off" will appear to in­dicate that the Measurement lock is released.

ISO 1

MODE

ISO 1

MODE

Reference:

If the power supply is OFF or Auto OFF when in the locked position, the dial lock function will

•
continue operating when the power supply is turned on again.

-6-

1. Setting measuring mode

1. Hold down the Mode set button !0 and turn the Jog wheel
t to select the desired mode. The mode switching sequence

is shown in the chart below:

4. Basic Operation

ENGLISH

MODE

Shutter speed priority
mode (Ambient light)

See page 11

Aperture Priority mode
(Ambient light)

See page 12

EV mode (Ambient light)
See page 13

Auto Reset Cordless
Flash mode

See page 17

Dip switch 1

Wireless Multiple Flash
Radio Triggering mode

See page 30

Wireless Flash Radio
Triggering mode

See page 30

Wireless Flash Radio
Triggering setting mode

See page 28

Cord Multiple Flash
(cumulative) mode

See page 19

with Radio
transmitter module

Dip switch 2

with Radio
transmitter module

with Radio
transmitter module

Dip switch 2

Cordless Multiple Flash
(cumulative) mode

See page 21

• Modes enclosed in dotted lines can only be selected when the respective DIP switch is in
ON position (see page 8).

• Modes enclosed in lines can only be selected when Optional Radio Transmitter Module is
installed.

Cord Flash mode
See page 15

Dip switch 2

-7-

4. Basic Operation

2. Setting DIP Switches

1. Switches for setting modes that are used infrequently are housed in the Battery compartment of
the meter. Select the mode you want prior to beginning measurements.

2. The DIP switches can be set by sliding the DIP switch !8 for the mode you want to select in the
ON position.

* EV settings

When DIP switch 1 is turned on, EV exposure reading is possible (ambient light).

* Multi settings

When DIP switch 2 is turned on, multiple flash (cumulative) mode is possible.

* Direct settings

If DIP switch 3 is on, it is possible to display the shutter speed and Aperture in the stop that are
set by DIP switch 4.
If turned off, shutter speed is displayed in full stop and the Aperture is displayed in 1/10 stop.

* Stop settings

The combination of shutter speed and Aperture is displayed in 1/2
stop when DIP switch 4 is off and in 1/3 stop when it is on.

T : full stop
F : 1/10 stop

T : 1/2 stop
F : 1/2 stop

1 2 3 4

T : 1/3 stop
F : 1/3 stop

-8-

4. Basic Operation

3. When set for incident light

1. Incident light measurements can be performed with the lumisphere fully extended or in the
retracted position. You can switch between Lumisphere in the up position or retracted position
by firmly rotating the Lumisphere retracting ring q until it clicks.

Lumisphere Retracted Lumisphere

2. When the Lumisphere is raised
This is used to photograph people, buildings, and other three dimensional objects.
Measurements are basically made by the method of measuring with the lumisphere aimed in
the camera direction (more precisely, in the direction of the light axis of the lens) at the position
of the subject.

ENGLISH

3. When the Lumisphere is lowered (flat diffuser function)
This is used to photograph manuscripts, paintings or other flat copy. It can also be used for
measuring illumination levels (see page 25), or brightness difference (see page 23).

NOTE:

• If the device is used with the Lumisphere retracting ring in a middle position, distributed
light quality will change, and suitable measurements cannot be made.

• Do not push the Lumisphere down manually.

• If the lumisphere becomes soiled, wipe it with a soft, dry cloth. Organic solutions (paint

thinner, benzene, etc.) must not be used under any circumstances.

-9-

4. Basic Operation

4. When set for reflected light

• This method measures the brightness (luminance) of the light reflected from the subject. It is
useful for distant objects such as landscapes, when you cannot go to the position of the subject,
or for metering subjects that generate light (neon signs, etc.), highly reflective surfaces or
translucent subjects (stained glass, etc.).

< Using the lumigrid > (Receiving Angle 54°)

1. Remove the Lumisphere

The lumisphere unit is removed by holding both the
upper and lower sections of Lumisphere retracting
ring q and turning it counterclockwise while pushing

the Lock lever !4 downward.

2. Mount the lumigrid

To mount Lumigrid @3, align the mount/removal
indicator on the Lumigrid with the mark and, while
pressing it, turn it in the clockwise direction and
secure it in place by raising the Lock lever until it
clicks into place.

3. Take measurements by aiming the lumigrid precisely at the area of the subject to be measured

from the position or direction of the camera.

4. Follow the same procedure to mount the lumisphere.

CAUTION:

• Be sure to avoid touching the light receiving section when mounting or removing the lumisphere
or lumigrid.

< Using the viewfinder > 1°, 5° and 10° Non-Parallax Spot-Finder (NP finder)

The Non-Parallax Spot-Finder mounted on the meter,measures the light of the exact area you
are viewing.Since the Spot-finder is measuring the reflected light (light reflecting off a
subject),measurements should be taken at the camera position.

-10-

5. Measurement

1. Measuring ambient light

In this measurement mode, we have the choice of shutter priority mode, aperture priority mode and
EV mode. Hold down the Mode set button !0 and turn the Jog wheel t to select ambient measurement
mode

1-1 Shutter Speed Priority mode

NOTE:

.

1. Hold down the Mode set button and turn the Jog
wheel to select Shutter Speed Priority mode .

2. Turn the Jog wheel to set the desired shutter
speed.

3. Press the Measuring button !5 to make a
measurement. Release the Measuring button to
complete the measurement. The measured value
(aperture value) at that time will be displayed.

While pressing the Measuring button, the meter
measures continuously until it is released.

• The LCD panel displays 1/10 stop only when Dip
switches 3 and 4 are in off position.

MODE

Set shutter speed

Measured f stop value

ENGLISH

1/10
f stop

Reference:

• It is possible to switch between full, 1/2 and 1/3 shutter speed stop by setting DIP

• You can set shutter speeds from 30 minutes to 1/8000 seconds. After 1/8000 the shutter

• After measurement, the F stop value corresponding to the shutter speed is displayed

• The measured aperture value is displayed either full or half stop increments on the

•“E.u” (Exposure under) or “E.o” (Exposure over) appears when the combination of shutter

• If the “E.u” or “E.o” readout blinks, this indicates that the light level is beyond the

Measured f stop

switches 3 and 4.

speeds of 1/200 and 1/400 can be set.

when the shutter speed is changed.

analog scale.(1/3 stop increments is not possible.)

speed and aperture are outside the display range. Changing the shutter speed or aperture
with the Jog wheel will allow you to find a combination that is possible.

measurement range of the light meter.Adjust a lighting in this case.

-11-

5. Measurement

1-2 Aperture Priority mode

1. Hold down the Mode set button !0 and turn the Jog wheel
t to select aperture priority mode

2. Turn the Jog wheel to set the desired f stop
value.

3. Press the Measuring button !5 to make a
measurement.
Release the Measuring button to complete the
measurement. The measured value (shutter
speed) at the time will be displayed.

While pressing the Measuring button, the
meter measures continuously until it is
released.

.

MODE

Measured value (shutter speed)

Set f stop value

1/10
shutter speed

Reference:

• It is possible to switch between full,1/2 or 1/3 F stop values by setting DIP switches 3 and

• You can set f stops from F1.0 to F90 (full f stops).

• The measured shutter speed value is displayed either full or half stop increments on the

• After measurement, the shutter speed corresponding to the F stop is displayed when the

Measured shutter speed

4.

analog scale.(1/3 stop increments is not possible.)

F stop is changed.

-12-

5. Measurement

MODE

1-3 EV mode

Open the Battery compartment cover !6 and slide the EV DIP switch (see page 8) to the ON
position.

1. Hold down the Mode set button !0 and turn the
Jog wheel t to select

value mode.

ENGLISH

Reference:

•“E.u” (Exposure under) or “E.o” (Exposure over) appears when the combination of shutter

2. Press the Measuring button !5to make a
measurement. Release the Measuring button to

Shutter speed

complete the measurement. The measured value
(EV value) at that time will be displayed.

At the same time, the shutter speed will be
displayed in the digital display area, and the
corresponding f stop will be displayed in the analog
display area.

While pressing the measuring button, the meter

f stop

EV value

measures continuously until it is released.

speed and aperture are outside the display range. Changing the shutter speed or aperture
with the Jog wheel will allow you to find a combination that is possible.
If the “E.u” or “E.o” readout blinks, this indicates that the light level is beyond the measurement
range of the light meter.

-13-

5. Measurement

1-4 Cinematography

1. Hold down the Mode set button !0 and turn the Jog wheel
t to select ambient light shutter speed priority mode

.

2. Turn the Jog wheel t to select the Cine Speed for the
camera that will be used. Cine Speed are displayed after
1/8000, 1/200, 1/400 and the unit is in frames per second
(f/s). The following Cine Speeds will display:
2, 3, 4, 6, 8, 12, 16, 18, 24, 25, 30, 32, 36, 40, 48, 50, 60,
64, 72, 96, 120, 128, 150, 200, 240, 256, 300 and 360
f/s.

MODE

3. The shutter angle that these speeds are based on, is

MODE

180 degrees. For other angles make the following ISO
film speed corrections.

Shutter open angle

160 degrees

220 degrees

Amount of ISO film

speed correction

-1/3

+1/3

* Example of correction value

-1/3: Decrease ISO film speed by 1/3 stop, example: ISO 100 -1/3 stop = ISO 80
+1/3: Increase ISO film speed by 1/3 stop, example: ISO 100 +1/3 stop = ISO 125

4. Press the Measuring button !5 to make a

Measured f stop value

measurement. Release the Measuring button to
complete the measurement. The measured value
(f stop value) will be displayed.

While pressing the measuring button, the meter
measures continuously until it is released.

1/10
f stop

Reference:

• The measured aperture value is displayed either full or half stop increments on the analog
scale.(1/3 stop increments is not possible.)

-14-

Measured f stop on analog display

Set shutter speed

5. Measurement

2. Measuring flash light

This method of measurement can be done in the following modes; with cord, without cord, multiple
flash with cord, multiple flash without cord and Wireless flash radio triggering mode (with optional
radio transmitter module). When Measuring flash light, the shutter speed and F stop value (value
combining ambient light and flash light: total amount of light) are displayed.The ambient light and
flash light are each displayed as separate values together with the total amount of light on the
analog scale. In addition, the ratio of flash light to the total amount of light is displayed at that time
as a value in 10% steps.The flash reading is displayed as a blinking mark above the analog scale.(See
page 27 for details)

2-1 Cord Flash mode

The most positive method to assure proper synchronization and measurement of flash units.
Connect the meter to the flash with a synchronization cord. Be sure to replace Synchro termi­nal cap @0 after your measurement.

1. Connect the flash synchro cord to the Synchro
terminal i on the exposure meter.

AVE./AEV

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ENGLISH

2. Hold down the Mode set button !0 and turn the
Jog wheel t to select cord flash mode

.

3. Turn the Jog wheel to set shutter speed. When
setting shutter speed, first check the settings to
confirm that they correspond to the settings on the
camera.

4. Press the Measuring button !5 to trigger the flash.
The measured value (f stop value) will be displayed.

MODE

Set shutter speed

Measured f stop value

Percentage of flash in
total exposure

1/10
f stop

measured f stop value
(total exposure)

-15-

5. Measurement

CAUTION:

• There is danger of electric shock if the meter is handled with wet hands, during rain, in
areas splashed by water or where there is a lot of moisture, if you use cord synchronized
flash.

• Under such conditions, it is recommended that you use the meter in the cordless flash
mode or wireless flash radio triggering mode, and keep the Synchro terminal cap in
place.

NOTE:

• The electronic flash unit may fire when you connect the Synchro cord or operate the
POWER Switch.

• For flash units with extremely low electric trigger voltage, the flash may not fire. In this
case, make measurements in the cordless flash mode or wireless flash radio triggering
mode.

Reference:

• It is possible to switch between full, 1/2 and 1/3 shutter speed stop by setting DIP switch
3 and 4.

• The shutter speed can be set from 30 minutes to 1/1000 of a second. After 1/1000 sec, the
meter can be set at the following intermediate speeds: 1/75, 1/80,
1/90, 1/100, 1/200, or 1/400.

• If the film speed is changed after the measurement is taken, the new converted measured
value (f stop value) will be displayed.

• After measurement, the F stop value corresponding to the shutter speed is displayed
when the shutter speed is changed.

•“E.u” (Exposure under) or “E.o” (Exposure over) appears when the combination of shutter
speed and aperture are outside the display range. Change the shutter speed with the Jog
wheel and take measurements again.

• If the “E.u” or “E.o” readout blinks, this indicates that the light level is beyond the
measurement range of the light meter.

2-2 Auto-reset cordless flash mode

Measurements are made by the meter receiving the light from the flash. This measurement
mode is used when the Synchro cord will not reach because of the distance between the flash
and meter or when use of the Synchro cord is inconvenient.

1. Hold down the Mode set button !0 and turn the
Jog wheel t to set Auto-reset Cordless Flash

mode

.

2. Turn the Jog wheel to set shutter speed. When
setting shutter speed, first check the settings to
confirm that they correspond to the settings
available on the camera.

-16-

MODE

3. When the Measuring button !5 is pressed, the
mode mark will blink and the meter is ready to
measure. The ready to measure mode will continue
for approximately 90 seconds.
During this time, fire the flash and make a
measurement.

4. If the 90 second period is exceeded and the blinking
mark stops, press the Measuring button again to
return to ready to measure.

5. When the light from the flash is received, the
measured value (f stop) is displayed. Even after
measurement, the mode mark

continues to blink
and the meter is in ready state and new
measurement can be made. (Auto-reset function)

5. Measurement

ENGLISH

Set shutter speed

Measured f stop value

Percentage of flash in
total exposure

1/10
f stop

Measured f stop value
(total exposure)

NOTES:

• When firing a flash, if the flash brightness is 9EV lower than the ambient light, the meter

• Rapid start fluorescent lamps and special lighting are sometimes mistaken for flash, and

Reference:

• After measurement, the F stop value corresponding to the shutter speed is displayed when

• Setting the shutter speed is similar to the previous instruction (see page 15) of "Cord flash

• A new converted value is displayed when the film speed is changed after taking the

• Readings outside the display range or beyond the measuring range are similar to the previous

may fail to detect the light. In this case, make measurements using the Cord flash mode.

accidentally measured. In this case, make measurements using the Cord flash mode.

the shutter speed is changed.

mode" of section 2-1.

measurement.

instruction (see page 16) of "Cord Flash mode" of section 2-1.

-17-

5. Measurement

2-3 Cord multiple flash (cumulative) mode

These measurements are used when the light generated by the flash is inadequate for proper
exposure. The repeated flash pops can be accumulated until the desired aperture is displayed.
The cumulative number is infinite. Only one digit is displayed if the cumulative number is ten or
more.Display returns 0 (0=10, 1=11, 2=12 etc.)

1. Slide DIP switch 2 to MULTI (see page 8) to the
ON position.
Hold down the Mode set button !0 and turn the
Jog wheel t to select cord multiple flash (cumu­lative) mode .

2. Turn the Jog wheel t to set shutter speed. When setting shutter speed, first check the
settings to confirm that they correspond to the settings available on the camera.

3. Connect the Flash synchro cord to the meter's
synchro terminal i.

MODE

4. Press the Measuring button !5 to trigger a flash. The measured f stop value at that time will
be displayed. Each time this is repeated, the accumulated f stop value and the number of
cumulative flashes is displayed.

1st. time 2nd. time 3rd. time

Number of cumulative flashes

Measured f stop

Percentage of
flash in total
exposure

1/10 f stop

Measured f stop value
(total exposure)

Set shutter speed

5. To clear the cumulative value,hold down Mode set button and ISO2 button y or switch to
another mode by turning the Jog wheel while pressing the mode set button.

-18-

5. Measurement

CAUTION:

• There is danger of electric shock if the meter is handled with wet hands, during rain, in
areas splashed by water or where there is a lot of moisture.
Under such conditions, it is recommended that you use the meter in the Cordless flash
mode or wireless flash radio triggering mode, and keep the Synchro terminal cap in place.

NOTE:

• The flash unit may flash when you connect the synchro cord or operate the POWER switch.

• When firing a flash to take measurements, check the camera's synchronizing range and

set the proper shutter speed.

• For flash units with low electric trigger voltage, the flash may not fire. In this case, make
measurements in Cordless flash mode or wireless flash radio triggering mode (see page

21).

Reference:

• Setting the shutter speed is similar to the previous instruction (see page 15) .

• Readings outside the display range or beyond the measuring range is similar to the previous
instruction (see page 16) .

• If the film speed is changed after the measurement is taken, the new converted measured
value (f stop value) will be displayed.

2-4 Cordless flash (cumulative) mode

These measurements are used when the light generated by the flash is inadequate for proper
exposure. The repeated flash pops can be accumulated until the desired aperture is displayed.
The cumulative number is infinite. Only one digit is displayed if the cumulative number is ten or
more.Display returns 0 (0=10, 1=11, 2=12 etc.)

ENGLISH

1. Slide DIP switch 2 to MULTI (see page 8) to the

ON position.

2. Hold down the Mode set button !0 and turn the

Jog wheel t to select cordless multiple flash
(cumulative) mode
Turn the Jog wheel to set shutter speed. When
setting shutter speed, first change the settings to
confirm that they correspond to the settings
available on the camera.

.

MODE

-19-

5. Measurement

3. When the light from the flash is received, the measured value (f stop) is displayed. Each

time this is repeated, the accumulated value for the aperture and the number of cumulative
flashes is displayed.

Number of cumulative flashes

Measured f stop

Percentage of
flash in total
exposure

1/10
f stop

1st. time 2nd. time 3rd. time

Set shutter speed

Measured f stop value
(total exposure)

4. The ready to measure mode will be displayed for approximately 90 seconds. If the 90

second period is exceeded and the blinking mark stops, press the Measuring button !5
again. The measured value (f stop) of the previous time reverts to 0 and the meter is in
ready to measure mode.

NOTE:

• When firing a flash, if the flash brightness is 9EV lower than the ambient light, the
meter may fail to detect the light. In this case, make measurements using cord flash
mode.

• Rapid start fluorescent lamps and special lighting are sometimes mistaken for flash,
and accidentally measured. In this case, make measurements using cord flash mode.

Reference:

• Setting the shutter speed is similar to the previous instruction (see page 15) of "Cord
flash mode" of Section 2-1.

• Readings outside the display range or beyond the measuring range is similar to the
previous instruction (see page 16) .

-20-

6. Advanced Functions

MEMORY

1. Memory function

This meter can store up to nine measured values in memory. This feature can be used in the follow­ing modes: ambient light (shutter speed priority, aperture priority and EV), flash (with, without cord
and wireless flash radio triggering).

1. Press the Measuring button !5 and take a measure­ment.

2. Press the Memory button u and store the measured
value in memory.
The number of values in memory is displayed on
the LCD. The memorized value is displayed on the
analog scale. By repeating this operation, up to nine
values can be stored in memory.

3. Memory can be cleared by holding down MODE set
button !0 and ISO 2 button y or changing mea­surement mode.

4. Memory Recall
When the Jog wheel !0 is rotated while both Memory
button t and the Mode set button !0 are held down
together, the measured value stored in the memory
is displayed along with the memory number. When
any previous stored value is recalled with the ex­ception of the last stored value, the “M” and number
will blink.

Number of
memorized value

Set shuttter
speed

Measured f stop
value

Memoreized
f stop values

ENGLISH

1/10
f stop

NOTE:

• The memory function cannot be used in "flash cumulative mode."

• Measured values for ten times and over will be displayed but cannot be stored in memory.

-21-

6. Advanced Functions

2. Averaging function

This function displays the average of two to nine of the values in memory.

1. Press the Measuring button !5 and take a
measurement.

2. Press the Memory button u and store the measured
value in memory.

3. When the AVE/ ∆ EV button r is pressed, an
average value for up to nine measurements will be
displayed on the LCD. The value in memory and
the average values are displayed on the analog
scale. An "

" appears in LCD to indicate this is an

average.

4. The average mode can be canceled by pressing
the AVE/ ∆ EV button.

Set shutter speed

Number of
memorized value

AVE./∆EV

MEMORY

Averaged
f stop

Averaging
indicator

1/10
f stop

Averaged f stop

Memorized
f stop value

-22-

6. Advanced Functions

AVE./∆EV

3. Brightness difference function

This function is useful for evaluating studio lighting and checking the evenness of the lighting set-up
across the subject area.
Take a measured value at a certain point as a standard value. The difference between the standard
value and a new measured value is displayed as EV and the measurements on the analog scale.

Example of adjusting lights using brightness measurement with shutter speed priority mode of Inci­dent light.

1. Turn the Lumisphere retracting ring q to lower it to the

mark position.

2. Turn any secondary light source off. Point the
Lumisphere w toward the main light source, from the
position of the subject and take a measurement. Press
the Memory button u and store the value in memory.

3. Press the AVE/ ∆ EV button r and display the "

" mark

on the LCD indicating a standard value.

AVE./∆EV

ENGLISH

4. Turn the main lighting off. Now, point the Lumisphere
toward the secondary light source. While the Measuring
button !5 is depressed and held down, the indicated
difference between the main and auxiliary light sources
is displayed in EV values. At the same time, the
standard value and a new measured value are
displayed on the analog scale. A lighting ratio (contrast
ratio) can be found in the scale below.

MEMORY

Set shutter speed

Now on reading

Difference
in EV

Memorized f stop value

f stop value being measured

-23-

6. Advanced Functions

EV difference of ∆ EV value

1

1.5
2
3
4

5. The Brightness Difference mode can be canceled by pressing the AVE/ ∆ EV button r.

Reference:

• To determine exposure after adjusting lights, turn both main and secondary light sources
on, raise the Lumisphere to the
light axis.

• This function can also be used for reflected light.

mark position, then take a reading along the camera

Contrast ratio

2 : 1
3 : 1
4 : 1
8 : 1

16 : 1

-24-

6. Advanced Functions

4. How to use the L358 as an incident illuminance (LUX or FC) meter

1. Turn the Lumisphere Retracting ring q to lower it to
the

2. Make sure that any compensation (see page 28) is
canceled (

3. Set the meter to EV mode (DIP switch 1) and ISO 100.

4. Place meter parallel to the subject and take a
measurement.

5. Convert the measured EV with a conversion table to
find the brightness level.

mark position.

).

ENGLISH

* EV value → Lux conversion table

Decimal places

EV

-2

-1
0
1
2
3
4
5
6
7
8

0 0.5

0.63

1.3

2.5

5.0
10
20
40
80

160
320
640

0.88

1.8

3.5

7.1
14
28
57

110
230
450
910

Decimal places

EV

9
10
11
12
13
14
15
16
17
18
19

* EV value → Foot candle (FC) conversion table

Decimal places

EV

-2

-1
0
1
2
3
4
5
6
7
8

0

0.06

0.12

0.23

0.46

0.93

1.9

3.7

7.4
15
30
59

0.5

0.08

0.16

0.33

0.66

1.3

2.6

5.3
11
21
42
84

Decimal places

EV

9
10
11
12
13
14
15
16
17
18
19

0

1300
2600

5100
10000
20000
41000
82000

160000
330000
660000

1300000

0

120
240
480

950
1900
3800
7600

15000
30000
61000

120000

0.5

1800
3600

7200
14000
29000
58000

120000
230000
460000
930000

1900000

0.5

170
340

670
1300
2700
5400

11000
22000
43000
86000

170000

-25-

6. Advanced Functions

5. Compensating function
5-1 How to change Exposure compensation

Exposure compensation can be made in precise 1/10 step increments in a +/- 9.9 EV range.
Exposure compensation may be desired when requiring compensation for filters, bellows
extension, etc.

1. Making a plus compensation will result in
underexposing when taking a photograph. Hold
the ISO 1 button !1 and the ISO 2 button y and
turn the Jog wheel t counter clockwise. The
will appear on the upper right part of the LCD.

ISO 1 ISO 2

2. Making a minus compensation will result in
overexposing when taking a photograph, Hold the
ISO 1 button and the ISO 2 button and turn the
Jog wheel clockwise.
The

will appear on the upper right part of the

LCD.

ISO 1 ISO 2

5-2 How to change Calibration compensation

Calibration compensation may be desired to match specific requirements or calibration to other
light meters.

1. To enter the calibration setting of the meter it must first be turned off.
Press the power button on while holding down the ISO 1 and ISO 2 buttons simultaneously;
the screen will display CAL 0.0 (for calibration).

2. The calibration setting can be changed by rotating the Jog Wheel while pressing and holding
down the ISO 1 and ISO 2 button simultaneously. A range of ± 1.0 EV in 1/10 stop increments
is possible for calibration. The calibration setting is not displayed on the main screen once
it is set.

NOTE:

• Make compensation after a sufficient number of test in actual photographic conditions,
to suit your needs.

• Compensation effects every mode of the meter.
If recalibration has been made for specific purpose do not forget to return to original
zero settings.

• In Exposure compensation the

always appear on the LCD,while the doesn’t appear

in Calibration compensation.

-26-

6. Advanced Functions

6. Flash analyzing measurement function

When measuring flash light, the shutter speed and F stop value (value combining ambient light and
flash light: total amount of light) are displayed in the liquid crystal display and the ambient light and
flash light are each displayed as separate values together with the total amount of light on the
analog scale. In addition, the ratio of flash light to the total amount of light is displayed at that time
as a value in 10% steps. It is possible to use this value for adjustments, for example, when
photographing with a flash in a room illuminated by tungsten lamp light, to emphasize or weaken the
tungsten lamp (ambient) light element (enhancing the flash light of the photograph) to match the
photographer's intentions.

< Example >

If, under certain conditions, the flash light component is
60% and the tungsten light component is 40%, the display
will be as indicated at the right.
Flash reading on the analog scale is blinking.

1. To emphasize the tungsten (ambient) light (to imbue
the atmosphere with orange-colored tones)
To increase the ratio of tungsten light, use the Jog
wheel t to change the shutter speed to a slower
setting.
It is apparent that the flash light component is now
20%. The analog scale also shows the tungsten
light component to be about 2.5 stop higher than
the flash light component.
As a result, images on the film are expressed with
orange tones that give life to the effect of the
tungsten light.

ENGLISH

2. To reduce the effect of tungsten light (to realize a
more natural atmosphere)
To decrease the ratio of tungsten light, use the Jog
wheel to change the shutter speed to a faster setting.
It is apparent that the flash light component is now
80%. The analog scale also shows the flash light
component to be about 1.5 stop higher than the
ambient light component.
As a result, the images on the film are expressed in
natural color tones.

The settings above are made by adjusting the tungsten (ambient) light by the shutter speed. It
is also possible to modify the ratio by adjusting the flash light (when changing the distance
between the flash and the subject or when changing the amount of light of the flash). When
using this method, re-measure each time the flash light is adjusted.

-27-

6. Advanced Functions

7. Wireless flash radio triggering function

With the radio transmitter module plugged into the meters radio compartment and a receiver (RR-32
or RR-4 sold separately) connected to one or more electronic flash units, the meter provides a
convenient system that enables one person working alone to measure flash output without the need
of a sync cord. Pressing the measuring button simultaneously triggers the flash and measures the
light.

The L-358 has 32 triggering channels when the radio-triggering module (RT-32) is plugged into the
radio compartment. Channels 1-16 provide single triggering, while channels 17-32 offer Selective
Quad-Triggering capability.Selecting one of channels (17-32) provides control of up to four additional
sub-channels (A, B, C, and D). Selecting or deselecting of zone lighting is possible with sub-channels.
In order to trigger flash units set for sub-channels, the electronic flash unit must be connected to an
RR-32 receiver (sold separately). With an RR-4 receivers (sold separately) triggering channels 1-4
can be selected.

< Example with optional radio receiver RR-32 >

1. Open battery cover !6, remove connector cover @2
and set the radio transmitter module (optional) by
aligning the connector with the pins.

RT-32
radio transmitter
module

CAUTION

• To prevent damage due to static electricity, release static electricity stored in your body
by touching a metal object nearby (door knob, aluminum window frame, etc.) before
touching the radio transmitter module.

2. Switch to the Wireless flash radio triggering setting
mode
set button !0.

by using Jog wheel t while pressing mode

MODE

-28-

6. Advanced Functions

3. The set channel number will blink at this time.
Turn the Jog wheel to set the channel setting.

4. In the Setting mode, "ch" appears on the ISO display area. At the same time, channel numbers
(1 to 16 and 17 to 32) appear on the F stop area. When the channel number is 17 to 32, sub­channel (A, b, c and d) settings are displayed on the T indicator. In the absence of settings, "­" appears in the figures.

5. In sub-channel settings, after the channel is set to 17 to 32, the mode button is pressed. Following
this, the 4th figure on the T (shutter speed) area blinks to indicate that settings may be made.
Every time the mode button is pressed, the blink shifts from sub-channel No. : 4th figure → 3rd
figure → 2nd figure → 1st figure → channel No., while permitting settings for each sub-channel.
As the Jog wheel is rotated in this state, setting ("A, b, c and d" displayed) and resetting ("-"
displayed) alternate. During this process, the indicator continues to blink to indicate the channel
being set.

→

Set by manipulating the mode set button.

↔ Set by manipulating the Jog wheel.

ENGLISH

CAUTION

• When using quad channels 17-32, it is not possible to terminate this mode unless a sub­channel has been set (a, b, c or d is displayed).

-29-

6. Advanced Functions

6. Upon setting completion, the Wireless flash radio triggering mode or Wireless multiple flash
radio triggering mode is selected using the Jog wheel while the mode set button is depressed.
For othe setting of measuremends see page 16 of “Cord flash”.

7. Confirm that the meter and the radio receiver are set to the same channel number. The flash
unit will fire when the measurement button of the meter is pressed and measurements can be
made at the same time.

Reference:

• Refer to the receiver instruction manual for the receiver operating method.

• Maximum controllable distance of the radio flash trigger system differs depending on the
placement of the device, direction and other factors.

1. Confirm the direct visible range between the transmitter and receiver.

2. Place the meter and receiver away from large metal objects, concrete, objects with

large moisture content (both people and trees fall into the category) and so forth.

3. Secure the radio receiver in place by using Velcro tape or mounting 1/4-20 thread.

Be sure that the entire length of the receiver antenna is higher than the flash pack at
this time. Avoid contact between the receiver antenna and metal objects at all times.

4. Depending on the location, there may be cases when the receiver is incapable of

receiving any radio signals whatsoever.
There are various possible reasons for this such as radio signals reflected from nearby
objects. This can generally be resolved by shifting the device slightly in one direction
or another.
In addition, confirm that the device is not placed behind objects that readily absorb or
deflect radio signals such concrete, metal, low hills, etc.

NOTE:

• The radio flash system may be used only in countries where a permit for the control
frequency has been issued by the govenment office in charge.

-30-

Mini Light Receptor (Sold separately)

• Incident light receiving unit with a compact 12mm diameter
light receiving surface.

• For measuring narrow areas used for photographing small
subjects or copy work.

Synchro cord (Sold separately)

• This is a five-meter long cord with three plugs. An exposure
meter, a camera, and a flash can all be connected at the
same time. This is convenient when measurements are
made, because it is not necessary to plug and unplug the
synchro cord.

7. Accessories

ENGLISH

18% Gray Card (Sold separately)

• 18% gray card with cover (110mm x 102mm, 4 1/4" x 3 1/
2"), folds to 2 3/4" x 4 3/4", and fits in a shirt pocket.

• It provides accurate exposures regardless of reflection ratio
of the subject and surroundings.

-31-

7. Accessories

NP Finder; Non-parallax spot viewfinder attachment with ordinary waterproof structure
(Sold separately)

• There are three types of NP finders with angles of coverage of 1°, 5° and 10°. Since the single-lens
reflex method is employed, it is possible to measure as aimed without parallax.

NP FINDER 1°

NP FINDER 5°

NP FINDER 10°

Wireless flash radio triggering system (Sold separately)

• Combining radio transmitter module (RT-32) with radio receiver (RR-32 or RR-4) enables
measurements by triggering the flash from the exposure meter.

Radio transmitter module
(RT-32, 32 channels)

-32-

Radio receiver
(RR-32, 32 channels)

Radio receiver
(RR-4, 4 channels)

8. Technical Data

· Type : Digital exposure meter for ambient and flash light

· Light receiving method : Incident light and reflected light

· Light Receptors
Incident light : Convertible to flat diffuser (Lumisphere in down position)
Reflected light : light receiving angle 54° (lumigrid)

· Light receptor element : 2-Silicon photo diodes (incident and reflected)

· Metering modes
Ambient light : Aperture priority metering

Shutter priority metering
EV metering

Flash : With synchro cord (cumulative, non-cumulative)

Without synchro cord (cumulative, non-cumulative)
Measurement using the optional wireless flash radio triggering sys­tem (cumulative,non-cumulative)

ENGLISH

· Measuring Range (ISO 100)
Ambient light : Incident light EV-2 to EV 22.9

Reflected light EV-2 to EV 22.9 (with 54˚lumigrid)

Flash : Incident light f1.0 to f90.9 (approx. F124)

Reflected light f1.0 to f90.9 (approx. F124) (with 54˚lumigrid)

· Repeat Accuracy : +/- 0.1 EV or less

· Calibration Constant
Incident light metering : Lumisphere C = 340 Flat diffuser C = 250
Reflected light metering : K = 12.5

· Display Range
Film speed : ISO 3 to 8000 (in 1/3 steps)
Shutter Speeds
Ambient light : 30 minutes to 1/8000 seconds (in 1, 1/2 or 1/3 stop) also 1/200, 1/400

Cine speeds- 2, 3, 4, 6, 8, 12, 16, 18, 24, 25, 30, 32, 36, 40, 48, 50,
60, 64, 72, 96, 120, 128, 150, 200, 240, 256, 300, 360 frames per
second (at a 180 degree shutter angle)

Flash : 30 minutes to 1/1000 second (in 1, 1/2 or 1/3 stop) also 1/75, 1/80,

1/90, 1/100, 1/200, 1/400
Aperture : f/1.0 to f90.9 (in 1/10, 1/2 or 1/3 stop)
EV : EV -9.9 to EV 40.1 (in 1/10 stop)
Analog display
Aperture : f/1.0 to f90 (in 1/2 stop)
Shutter speed : 2s to 4k (1/4000) (in 1/2 stop)

-33-

8. Technical Data

· Other features
All-weather feature : JIS standard water resistance class 4, splash-proof type
Memory function : 9 readings
Memory clear • recall function
Multiple Flash function : Up to ∞ flash readings (Only one digit is displayed when the cumu-

lated number is ten or more.)
Average function : Up to 9 readings can be averaged.
Brightness Difference function:+/- 9.9 EV (in 1/10 stop)
Flash analyzing function
Exposure Out of Range : Eu (underexposure) or Eo (overexposure) indication
Exposure compensation : +/- 9.9 EV (in 1/10 steps)
Calibration compensation
Battery Power Indicator display
Auto Power Off : 20 minutes after last use
Auto illumination : EV 6 and under

· DIP switch mode selection

: 0 to 100% in 10% in crements

: +/- 1.0 EV (in 1/10 steps)
: with a symbol in 3 status

·

Second ISO film speed setting:ISO 3 to 8000 (in 1/3 stop)

· Battery used : one of CR123A battery (lithium dry cell)

· Operating temperature range : -10 ~ 50°C

· Storage temperature range : -20 ~ 60°C

· Dimensions : 60 w × 155 h × 37 d mm

· Weight : 153 g (with battery)

·

Standard accessories supplied

· Radio wave frequency
FCC & IC : CH1 ~ 16 344.0MHz

CE : CH1 ~ 16 433.62MHz

: Lumigrid, Soft case, strap, synchro terminal cap, CR123A lithium

battery × 1

CH17 ~ 32 346.5 ~ 354.0MHz

CH17 ~ 32 434.22MHz

Features and specifications are subject to change without notice.

-34-

9. Safety Guide

WARNING

• Please keep in a location where an infant cannot reach and accidentally get the
strap wrapped around his neck. There is danger of strangulation.

• Never place batteries in fire, short, disassemble, or heat them. The batteries might
break down, and cause injury or pollute the environment.

CAUTION

• Do not look directly at the sun through the viewfinder, because of potential eye
injury.

• If you are operating the exposure meter in areas under wet conditions or high
humidity, keep the sync post covered. If you are using flash in these conditions,
Cordless Flash mode is recommended.

ENGLISH

-35-

10. Care and Maintainance

NOTE:

• Although this meter has an All-weather design for everyday use (JIS standard water
resistance class 4), do not place it in water or use it underwater. This will cause it to
malfunction.

Splashed

Rain

• To avoid damaging this meter, never drop it or subject it to shock.

• Avoid storing it in places with high temperatures or humidity.

• Avoid excessive temperature changes which could cause internal condensation,
resulting in malfunction.

Do not wash with water

Do not submerge or use under water

Maintenance Notes

• If your meter is splashed with water, wipe immediately with a soft dry cloth.

• Avoid applying excessive force on the rubber seal of the battery compartment cover.
Do not attempt to remove the rubber seal of the battery compartment cover.

• If the rubber seal’s surface is damaged,water or moisture may enter and damage the
meter. If this has happened, you must send your meter to the Sekonic Sevice Center in
your country.

• Keep the surface of the Lumisphere and the front and rear surface of the Zoom lens
free from dust, dirt, and scratches, which could affect accuracy.

• Never use organic cleaners (like thinner or benzene). Clean with soft dry cloth.

-36-

FCC & IC compliance information:

Warning: Changes or modifications to this unit not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant.

To Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction, may cause harmful interference
to radio communication.

However, there is no guarantee that interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception, which can be determine by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:

* Reorient or relocate the receiving antenna.
* Increase the separation between the equipment and receiver.
* Consult the dealer or an experienced radio/TV technician for help.

This device complies with Part 15 of the FCC rules and also with RSS-210 of Industry & Science Canada.
Operation is subject to the following two condition: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received, including interference that may cause undesired
operation.

FCC ID Number: PFK-358-01 Canada: 3916104183

ENGLISH

-37-