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Praktica LTL Instructions for Use
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Praktica LTL
Instructions for Use.
We are extremely pleased that you have chosen the high-quality PRAKTICA LTL, and we wish
you every success in working with this modern reflex camera.
Before using your camera, however, we would request you to study the Instructions for Use
carefully. This will help you to avoid trouble caused by wrong handling of the equipment.
The PRAKTICA LTL is a miniature single-lens reflex camera for the 24 mm × 36 mm picture
format, with automatic exposure control and internal metering to which the shutter-speed, aperture and
film-speed settings are coupled. The measuring system employed is partially integrated, the main
measuring field , about 20 mm in diameter, being arranged in the centre of the viewfinder. The result is
perfectly accurate metering since, with the most majority of subjects, the most important details of the
image are located within this area. All the subordinate marginal sections are photometrically left aside
and cannot influence the reading.
Metering is performed with the lens stopped down to taking aperture by adjusting the diaphragm
ring on the lens mount while depressing the metering key. By means of this key the circuit is closed.
All lenses having the international PRAKTICA fitting M42×1 may be used. The automatic mechanism
in the camera causes the pressure diaphragm in the lens (APD) to operate as a spring diaphragm. This
means that only during the actual moment of exposure the diaphragm closes down to the value
obtained by means of the light meter.
The novel type of metal-bladed focal-plane shutter travels across the shorter side of the frame and
has a range of speeds from 1 sec. to 1/1000 sec. It is synchronized for the use of flash bulbs and
electronic flash units. As a result of the very rapidly moving steel curtains, the electronic flash can be
synchronized at about 1/125 sec. The centre contact makes it possible to connect camera and flash unit
without using a coble.
The PRAKTICA LTL can be supplied either with or without built-in-self-timer.
The pentaprism is firmly built in, and the focusing system, due to its Fresnel lens, reveals a finder
image of maximum corner-to-corner brightness, in which also the meter needle and the readiness
indicator are visible.
Microprism screen and groundglass circle ensure quick and perfect sharp focusing. In combination
with its wide range of accessories, the PRAKTICA LTL may be employed for a great variety of
special photographic activities.
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Praktica LTL Instructions for Use
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Control Parts of the Praktica LTL
1 – Knob for setting the shutter speeds;
2 – Metering key;
3 – Shutter release;
4 – Cocking lever for self-timer;
5 – Self -timer release knob;
6 – Rewind knob.
07 – Rewind crank;
08 – Accessory shoe;
09 – Centre flash contact;
10 – Exposure speed index;
11 – Rapid wind lever;
12 – Film speed scales;
13 – Film speed indicator;
14 – Exposure counter;
15 – Manual stop down key;
16 – Distance setting ring;
17 – Diaphragm setting ring;
18 – Depth-of-field scale.
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19 – Rewind catch;
20 – Cartridge chamber;
21 – Metal-bladed focal-plane shutter;
22 – Transport sprocket;
23 – Supporting piece;
24 – Take-up spool;
25 – Green marking point;
26 – Wire brackets.
28 – Rewind release knob;
29 – Battery lid;
30 – Tripod nut.
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Praktica LTL Instructions for Use
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A. Opening the camera back
Pull rewind knob (6) upward until you feel hard
resistance. The camera back is thus unlocked and can be
opened. The exposure counter (14) will automatically jump
to zero position.
B. Inserting the film
Any type of 35 mm film in commercially available
standard cartridges may be used. The cartridges contain
film lengths for 36, 20 or 12 exposures in the 24 mm × 36
mm format. To ensure that light enters the slit of the
cartridge the film should not be loaded in direct sunlight.
The shade of your own body will suffice.
By having pulled out the rewind knob (6) to open the
camera back you hove withdrawn the rewind catch (19)
from the cartridge chamber (20), and you can now place the
cartridge into the cartridge chamber.
Push the rewind knob, with slight backward and forward
movements, right back into the camera. The rewind catch
will engage in the core of the cartridge.
Push the beginning of the film projecting out of the
cartridge from above as for as it will go underneath the
supporting piece (23) on the transport sprocket (22). The
beginning of the film strip must now lie on the core of the
take-up spool (24) and meet the green marking point (25).
The wire bracket (26) of the take-up spool must not
stand upwards. Should the happen to be the case the
milled flange of the spool has to be turned to move the
bracket wires to lateral position.
C. Closing the camera back
Take hold of the latch side of the camera back and press
it firmly to the camera body. It will lock automatically.
D. Preparing for the exposure
The rapid wind lever (11) has an idle stroke of about 15° when brought from its rest position into
readiness for action. It can be easily grasped – a great advantage, especially in serials shots.
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Praktica LTL Instructions for Use
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Swing the cocking lever around as far as it will go, move it back again, and depress shutter release
knob (3). Repeat these operations and then cock the shutter once more. The automatic exposure
counter (14) now stands on number “1”. Special setting of the exposure counter is not necessary since
it starts working automatically when the camera back is closed.
To avoid inadvertent tripping, the shutter release (3) is provided with a locking device. The release
mechanism is locked when the red dots on the knob and on the outer ring meet. The mechanism is
unlocked by rotation of the knob through 90°.
Shutter can be released
Shutter release locked
E. Setting the exposure speed
For the automatic exposure control, the film speed
value has to be set. This is done by lifting the milled
ring of shutter-speed setting knob (1) and rotating it
until the speed value of the film in the camera (DIN or
ASA) on scale (12) stands opposite the white indicator
(13). When lowered, the milled ring clicks in next to
the selected film speed numeral.
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Praktica LTL Instructions for Use
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F. Setting the film speed
The metal-bladed focal-plane shutter can be set for exposure speeds ranging from 1 sec. to 1/1000
sec. When set on “B” the shutter remains open as long as the release knob (3) is being depressed. For
exposures of a longer duration a cable release with locking device should be used, which can be
screwed into the thread in the body release knob. For exposure speeds in connection with flash units
please refer to Section O.
The slow speed exposures from 1 sec. to 1/15 sec. are
marked on the scale of the shutter-speed setting knob (1)
by orange-colored numerals. For exposures to be made of
these speeds a tripod is required. The values for instantaneous shots from 1/30 sec. to 1 /1000 sec. are marked in
white.
The exposure speeds are set by rotating knob (1) until
the desired numeral coincides with the orange-coloured
triangle (10) on the cover plate of the camera. Please
note, when setting the exposure speeds that the milled
ring of the setting knob must not be lifted up since this
would alter the film speed setting and cause the
automatic exposure system in the PRAKTICA LTL to
give incorrect results.
The exposure speeds can be set either before or after the shutter has been cocked. The setting knob
clicks in of every numeral. Intermediate values ore not adjustable.
G. Setting the diaphragm
On the lenses with automatic pressure diaphragm (APD) the desired aperture numeral on the
diaphragm setting ring (17) simply has to be brought to meet the red index mark on the lens mount. At
first, the diaphragm remains fully open, and then closes down to the preselected value when the shutter
release is depressed. The automatic diaphragm mechanism in the PRAKTICA LTL causes the pressure
diaphragm to function as an automatic spring diaphragm. Regardless of the speed with which the
shutter release (3) is depressed, the
diaphragm will spring to the preselected value and then open again immediately after the shutter has run down.
For checking the depth of field in
the viewfinder image, most lenses can
be stopped down, before the exposure
is made, to the preselected value or to
the value determined by the light meter, by actuation of a manually operable key on the lens mount. In the
PRAKTICA LTL, this may be very
conveniently achieved also by means
of the metering key (2).
H. Automatic exposure control
The automatic exposure control system in the PRAKTICA LTL offers two possibilities of
measuring the exposure time:
1. You preselect the shutter speed and adjust the diaphragm numeral on the lens mount.
2. You preselect the diaphragm numeral and adjust the shutter speed.
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The first method is applied if, for instance, movement of the object requires a certain exposure
speed, whereas the second method will preferably be applied it a specific aperture has to be preselected
to achieve the necessary depth of field.
Metering with shutter speed preselected
Preselect shutter speed by means of knob (1). Press metering key (2) above the shutter release
towards the camera body as far as it will go, while at the same time rotating diaphragm setting ring
(17) on the lens mount till the meter needle visible in the viewfinder is centered in the circular mark.
The diaphragm of the lens opens or closes in accordance with the adjustment of the diaphragm setting
ring. In lenses with automatic pressure diaphragm it opens after metering, when pressure on the
metering key relaxes, and closes down automatically to the measured value when the exposure is
made.
1. Resting position of the needle
2. Needle centered in circular mark
Metering with diaphragm stop preselected
Preselect diaphragm numeral in accordance with exposure conditions by rotating diaphragm setting ring (17) on lens mount. Depress metering key as described above, while
at the same time adjusting shutter speed setting knob (1) till the meter needle is centered.
The shutter speeds must be set to the click
stops. Intermediate values cannot be set.
Should the meter needle not be accurately
centered, fine adjustment has to be made by
means of the diaphragm setting ring on the
lens mount. The diaphragm ring can be set to
intermediate values between the click stops.
Using lenses without automatic diaphragm control
In case lenses without automatic pressure diaphragm are being used, the lens will remain stopped
down till the shutter is released. To achieve precise definition it is, therefore, advisable to focus with
the lens wide open before taking the meter reading.
Owing to the construction of their barrels, some of the older types of lenses protrude so far into the
inside of the camera body, as to impede the functioning of the automatic diaphragm, the mirror, and
the shutter. The metering key (2) cannot be actuated either. By no means use force, so as not to cause
damage to the camera! Lenses with barrels of this kind (see illustration left below) cannot be used in
the PRAKTICA LTL.
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Praktica LTL Instructions for Use
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Not to be used
To be used
Working range of the automatic exposure control system
The following table shows within which range of shutter speeds the automatic system works in connection with the various film speed settings. Outside of this range the metering system is disconnected.
The meter needle then moves to its resting position below the circular mark.
Speed of film DIN
ASA
Exposure speed
12
0012
1 sec. to 1/125 sec.
15
0025
1 sec. to 1/250 sec.
18
0050
1 sec. to 1/500 sec.
21
0100
1 sec. to 1/1000 sec.
24
0200
1/2 sec. to 1/1000 sec.
27
0400
1/4 sec. to 1/1000 sec.
30
0800
1/8 sec. to 1/1000 sec.
33
1600
1/15 sec. to 1/1000 sec.
I. Focusing
The prism viewfinder of the PRAKTICA LTL is fitted with a Fresnel lens, in the centre of which
are the two focusing systems:
– the microprism screen right in the
middle and
– the circular groundglass area surrounding it.
To achieve utmost definition, focusing is preferably performed with the
lens at full aperture. In lenses with
automatic pressure diaphragm (APD)
this takes place in any case if the
metering key is not being depressed.
If lenses without automatic diaphragm are being employed, focusing is
performed, as already stated in Section
(H), with the lens at full aperture
(smallest diaphragm numeral) before
the meter reading is taken.
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Focusing on the microprism screen
The image in the microprism screen is in correct focus as soon as it appears clear and free from
fuzziness. It is out focus if it looks fuzzy and shows screen elements. The microprism screen is
preferred for focusing if the subject to be photographed is quite still or only slightly moving.
Microprism screen is fuzzy = unsharp
Microprism screen not fuzzy = sharp
Focusing on the circular groundglass area
The groundglass area is used for focusing it there is more movement in the scene. Also, it is often
most appropriate in ultra-close-ups and in photomicrography.
The Fresnel section of the viewfinder is not meant to be used in focusing.
The depth of field is determined by means of the depth-of-field scale (18) arranged on the right and
left of the red indicator on the lens mount.
While the camera-to-subject distance figure stands opposite the red mark, the limits of the range of
definition can be read from the distance scale above the numerals on the depth-of-field scale, which
latter are equivalent to the diaphragm numerals. As an example, the illustration shows a zone of
sharpness from 2 to 5 m (7 ft. to 16 ft.) for a distance setting of 3 m (10 ft.) and an f/8 aperture.
Depress the metering key (2), or
the manual stop down key (15) provided on most of the lenses, and you
will also be able to judge the depth of
definition in the finder image.
Persons with defective eyesight
may work without their spectacles on
by having a corrective lens corresponding to their long-distance glasses
fitted into the eye cup which is then
attached to the ocular mount (see
Section “Accessories”).
For infra-red exposures the focusing point has to be slightly modified.
By rotation of distance setting ring
(16) the distance reading which, after focusing, stands next to the red indicator, has to be moved to
meet the red dot (infra-red mark). Thus, the image produced by the infra-red rays is brought into
correct position in relation to the film.
K. Releasing and cocking the shutter
Before releasing the shutter, please note the following:
1. Make sure that the shutter release (3) is unlocked (see Section D).
2. If the signal is visible in the left side of the viewfinder, the camera is not ready for exposing.
The shutter has to be cocked!
3. For exposure speeds of 1/15 sec. and slower, a tripod and a cable release have to be used.
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Praktica LTL Instructions for Use
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Your PRAKTICA LTL should be held so that it lies firmly in both hands and you are able to actuate
the shutter release comfortably.
Depress the shutter release steadily – never with a jerk – to beyond the soft-running range until the
shutter runs down.
The close proximity of metering key and shutter release enables releasing the shutter immediately
after taking the meter reading, with the metering key still in depressed position and the lens remaining
at taking aperture. But the shutter release can also be actuated alone, in which case АРD lenses are
fully open up to the moment of the exposure.
After the exposure, the signal on the left side of the viewfinder image becomes visible again, a sign
that the shutter has to be cocked.
L. Self-Timer
The self-timer mechanism is cocked by moving lever (4) upwards as far as it will go. By means of
pressure on knob (5) it will start running, and after about 10 seconds the shutter is released. The selltimer mechanism may be cocked either before or after the shutter is cocked. Also, the shutter can be
released in the usual manner by means of release knob (3) even if the self-timer is cocked.
M. Changing the film
When the exposure counter (14) indicates the number of frames obtainable with the film in the
camera (12, 20 or 36 exposures) the film has to be rewound into the cartridge which is then taken out
of the camera.
Depress rewind release knob (28) in the base of the camera. It will remain locked in this position.
Unfold rewind crank (7) out of rewind knob (6) and rotate it, not too quickly, in the direction of the
arrow (mark on crank (7)). Rewinding at too great a speed may cause electrostatic charge and statics
on the film.
Just before rewinding is completed, greater resistance becomes noticeable until the film is
disengaged from the take-up spool. After this, the crank turns quite easily.
Fold the rewind crank back into the knob and pull the knob upwards as far as it will go. The camera
back is thus unlocked and can be opened. Remove the cartridge with the exposed film from the
camera.
Loading a new film, and subsequent cocking of the shutter, cause the rewind knob (28) to spring
back automatically to its initial position.
Should you have attempted to expose more frames than the number marked on your film pocket, the
cocking lever might, at the end, of the film, get jammed so that it cannot be swung around completely.
Never use force in such a case as this might tear the perforation of the film, or the end of the film
might slip off the spool inside the cartridge. In both cases, rewinding would be impossible.
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It the cocking lever – as described above – could not be fully cocked, this must be completed, and
the shutter released, after the usual rewinding procedure and before a new film is inserted.
N. Exchanging lenses
The standard lens of the PRAKTICA LTL
can easily be replaced by lenses of other
focal lengths or apertures. You take hold of
the lens body, as shown in the illustration
opposite, and turn it in an anti-clockwise direction. The exchange lens is inserted accordingly and screwed tight by clockwise rotation.
All lenses having the international PRAKTICA screw fitting M42×1 may be used.
Only some of the older types of lenses are
not suitable because of their structural design
(please refer to Section H).
Standard lenses:
T from Jena
0050 mm f 2.8
(APD)
Pancolar from Jena
0050 mm f 1.8
(APD)
PENTACON auto
0050 mm f 1.3
(APD)
Supplementary lenses:
Flektogon from Jena
0020 mm f 4
(APD)
PENTACON auto
0029 mm f 2.8
(APD)
PENTACON auto
0100 mm f 2.8
(APD)
PENTACON
0135 mm f 2.8
(PD) and Adapter
S from Jena
0180 mm f 2.8
(ASD) and Adapter (SD)
PENTACON
0200 mm F 4
(PD) and Adapter
PENTACON
0300 mm f 4
(PD) and Adapter
PENTACON
0500 mm F 5.6
(PD) and Adapter
Mirror Lens from Jena
1000 mm f 5.6
(no diaphr.) and Adapter
FD = pro-set diaphragm
APD
=
automatic pressure diaphragm
ASD
=
automatic spring diaphragm
SD = spring diaphragm
*) In conjunction with the PRAKTICA LTL camera the ADP is converted into the higher grade ASD.
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Praktica LTL Instructions for Use
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O. Flash exposures
The shutter of the PRAKTICA LTL is
desig-ned for synchronization with flash bulbs
and electronic flash units.
When the flash unit is attached to the camera, the electric connection between camera and
unit is automatically effected by means of the
centre contact (9) in accessory shoe (8). Thus,
no synchronization cord is required. Modern
flashbulb and electronic units are equipped for
this purpose with a suitable accessory shoe
fitting.
For the use of flash units fitted with a synchronization card, an adapter piece with flash
socket to accept the plug of the card has to be
pushed into the accessory shoe of the
PRAKTICA LTL.
Flash bulb exposures
In connection with bulbs for short flash duration, the shutter has to be set for a speed of 1/30 sec. –
marked by the lamp symbol – or slower. The ignition circuit is closed only as long as the shutter runs
down. No contact is made during the cocking procedure, so that flash bulbs can be exchanged also
before the shutter is cocked.
Electronic flash exposures
Owing to the extremely rapid travel of the curtains in the metal-bladed focal-plane shutter,
synchronization is possible up to a shutter speed of 1/125 sec. The knob for setting the shutter speeds
has to be moved to the flash symbol setting next to “B”.
The guide number
The diaphragm numeral to be set on the lens mount for flash exposures can be found with the aid of
the “guide number”. Manufacturers of bulbs and electronic flash units give these guide numbers on the
wrappings or in the instructions for use as required for the various sensitivity grades of the films. The
correct aperture is determined by dividing the guide number for the flash in use by the flash-to-subject
distance figure. Formula for the flash unit attached to the accessory shoe of the camera:
Diaphragm numeral =
guide number
flash-to-subject distance
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Praktica LTL Instructions for Use
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P. Exchanging the power source
The automatic exposure system is powered by a Mallory
mercury oxide battery PX 13, PX 625 or any other corresponding type having a nominal voltage of 1.35 V (new type –
non mercury oxide battery – Varta V 625 U).
The battery compartment is on the underside of the
camera. The lid (29) is screwed out with the aid of a coin and
the new battery placed into the compartment with its positive
pole (marked +) facing the lid. The lid is then screwed on
and fastened with the aid of a coin.
Since the battery is used only for the short period of measuring the light it will last for about 2 years.
Please note that the consumed battery (primary cell) must
not be charged or thrown into the fire Both might cause
explosion!
Q. Maintenance and care
The PRAKTICA LTL is a highly valuable precision instrument. Perfect functioning of the camera
depends very largely on proper handling and careful maintenance.
The camera must, above all, be protected against shock, dust and moisture. That is why the
everready case should be used wherever possible.
From time to time the cartridge chamber and spool chamber, also the film track and camera back
with film pressure plate must be cleaned with a soft brush. But be careful not to exert pressure on the
steel blades of the shutter or to touch them with your fingers.
Neither should the optical parts (lens, eyepiece of viewfinder, mirror) be touched. Should this have
happened, however, any fingerprints must be removed immediately with a piece of fine linen after a
soft brush has been used to remove any possible dust.
The mirror should be dusted only in urgent cases with a very soft brush.
Never interfere with the mechanism of the camera. Repair work should be carried out only by one
of our special Repair Workshops.
Special literature on the accessories for the PRAKTICA LTL, which are only briefly mentioned
here, will be sent on request.
We request you kindly to follow these instructions for Use carefully. We can accept no liability for
any damage which may be caused by improper handling of the equipment.
Kombinat VEB PENTACON DRESDEN
Deutsche Demokratische Republik
Further development of the PRAKTICA LTL and its accessories may lead to slight modification of
the details given in this booklet.
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Praktica LTL Instructions for Use
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R. Accessories
It is the accessory equipment that makes the PRAKTICA LTL universally applicable in the vast
range of photographic activities.
Everready Case
It protects the camera against shock
and dirt without impairing its readiness
for action.
Cable Release
For exposures of a longer
duration from the tripod, for
close-up work and photomicrography. For prolonged
time exposures it is advisable
to use a cable release with
locking device.
Lens Hood
Eliminates disturbing flares in counterlight
photography and protects the lens surface in rainy
weather from getting wet. The lens hood must
match the image angle of the lens.
Filters
These are screwed into the filter thread of the
lens mount. In colour photography, special types
of filter – except in the case of UV and polarizing
filters – are required.
Rubber Eye Cup with Mount for correcting lens
Keeps out extraneous light during focusing. Persons with
defective eyesight may have a correcting lens corresponding to
their long-distance glosses fitted in. The eye cup can be swung
around for exposures in the vertical.
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Praktica LTL Instructions for Use
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Focusing Telescope
The focusing telescope yields an additional 2.7fold magnification of a section of the finder image.
It is adjustable to the eye by means of a dioptre
focusing mount.
Angle Finder
To be attached to the ocular mount. It is rotatable to any
viewing direction and reveals a complete upright and
laterally correct finder image. Adjustment by means of
dioptre scale is possible.
Intermediate Rings
These rings are screwed in between lens and camera either individually or combined, as a means of
increasing the picture ratio in close-up work. Rings provided with plunger pins keep the automatic
diaphragm mechanism operative.
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Praktica LTL Instructions for Use
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Reversing Ring
To screw the lens into the camera by its filter
thread for extreme close-ups with an image ratio
exceeding 1.5x.
Miniature Close-up Bellows Attachment
Permits an infinite variation of the image
ratio in close-up work from approx. 0.7x to
2.5x in combination with the standard lens.
Bellows Attachment with Focusing Slide
This equipment permits an infinite variation of the image ratio with the standard lens
from 0.7x to 44x.
Special Intermediate Ring with Cable
release Connection
For use with the bellows attachment, in
connection with a double cable release, to
keep the automatic diaphragm mechanism
operative.
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Praktica LTL Instructions for Use
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Focusing Slide
Of great advantage in close-up work
with a tripod (e.g. the Universal Tripod).
Enables adjusting the camera-to-object
distance without moving the tripod.
Universal Tripod
Extremely rigid, for varying position of camera from close to
ground up to about eye level. All direction pan and tilt movement.
Transparency Copying Equipment
Supplementary device for the bellows attachment with
focusing slide, as a means of making transparencies and
intermediate negatives 24×36 mm from negatives or
reversal transparencies.
Microscope Attachment Piece
For connecting camera and
microscope.
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Praktica LTL Instructions for Use
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Copying Stand with Lighting Equipment
Suitable, in connection with the repro arm, for
all kinds of reproduction and close-up work.
Repro Arm with screw thread M49×0.75
Extra fitting for the copying stand, to accept any reflex camera up to the size of 6×6 cm (2 ¼″ ×
2 ¼″ in.) which is screwed in securely by the filter thread of its lens Adapter ring available for filter
thread M58×0.75, in preparation for the M55×0.75 thread.
http://eugigufo.net/download/photovideo/
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