The Canon Speedlite 270EX II is a compact flash unit for Canon EOS cameras, and works
with the E-TTL II and E-TTL autoflash systems. All control is performed on the camera side,
letting you easily enjoy flash shooting in the same manner as a built-in flash.
Use with an EOS DIGITAL camera
• The 270EX II is designed for optimum use with an EOS DIGITAL camera.
Use with an EOS film camera
• When used with an E-TTL II or E-TTL autoflash EOS film camera, autoflash shooting can
be performed in the same manner as when used with an EOS DIGITAL camera.
• The 270EX II cannot be used with TTL autoflash EOS film cameras.
Be sure to also read the description of flash shooting in the camera’s instruction
manual. For convenience, a camera compatible with E-TTL II/E-TTL autoflash systems is
indicated as Type-A camera in camera’s instruction manuals.
Based on new size-AA/LR6 alkaline batteries and Canon’s testing standards.
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Be sure to use a new set of two batteries of the same brand. When replacing the
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batteries, replace both batteries at once.
Do not fire more than 20 continuous flashes in a short time.
If you fire more than 20 continuous flashes in a short time, the overheating prevention
function may be activated and make the recycling time about 8 to 20 sec. If this occurs,
allow a rest time of about 15 min. and the functioning of the flash will then return to
normal.
If you change the batteries after firing flashes continuously, be aware that the batteries
might be hot.
Using size-AA/LR6 batteries other than the alkaline type may cause improper battery
contact due to the irregular shape of the battery contacts.
Size-AA/LR6 Ni-MH or lithium batteries can also be used.
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Attaching the Flash
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Be sure to turn off the Speedlite before attaching or detaching it.
Slide the lock lever to the left and
1
attach the Speedlite to the camera.
Slip the Speedlite’s mounting foot firmly all the way
into the camera’s hot shoe.
Secure the Speedlite.
2
Slide the lock lever to the right.To remove the Speedlite, slide the lock lever to the
left and detach it from the camera.
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Fully Automatic Flash Shooting
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When you set the camera shooting mode to <V> or Full Auto, you can shoot in fully
automatic flash mode.
1 Set the power switch to <
BThe flash recycling starts.
ON
>.
2 Check that the <Q> lamp is lit.
When the <Q> lamp lights, you can shoot with the
flash.
See p.26 for guidelines about the flash shooting range.Shooting is also possible when the lamp is blinking (Quick Flash), but the flash
output level will be 1/2 to 1/3 the normal flash.
3 Take the picture.
When the resulting picture is dark, move closer to the subject or increase the ISO speed
and try shooting again.
Quick Flash cannot be used when the flash mode is set to M: Manual Flash (p.14).Quick Flash cannot be used during continuous shooting. (To enable flash, see p.16)Set the power switch to <
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SLAVE
> for wireless flash shooting (p.17).
Flash Shooting in Each Camera Mode
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X: Shutter Priority AE
In this mode, the camera will automatically adjust the flash output level to achieve standard
exposure for the automatically set aperture.
• If the aperture display blinks, it means that the background exposure will be underexposed
or overexposed. Adjust the shutter speed until the aperture display stops blinking.
W: Aperture Priority AE
In this mode, the camera will automatically adjust the flash output level to achieve standard
exposure for the set aperture.
If the background is dark, like a night scene, a slow sync speed will be used to obtain a
standard exposure of both the main subject and background. Standard exposure of the main
subject is obtained with the flash, while a standard exposure of the background is obtained
with a slow shutter speed.
• Since a slow shutter speed will be used for low-light scenes, using a tripod is
recommended.
• If the shutter speed display blinks, it means that the background exposure will be
underexposed or overexposed. Adjust the aperture until the shutter speed display stops
blinking.
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q: Manual Exposure
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Select this mode if you want to set both the shutter speed and aperture manually.
As the camera will automatically adjust the flash output level according to the aperture you
set, the exposure of the main subject will be standard. The exposure of the background is
obtained with the shutter speed and aperture combination you set.
Flash Sync Speeds and Apertures Used
Shutter Speed SettingAperture Setting
VSet automatically (1/X sec. - 1/60 sec.)Automatic
XSet manually (1/X sec. - 30 sec.)Automatic
WSet automatically (1/X sec. - 30 sec.)Manual
qSet manually (1/X sec. - 30 sec., Bulb)Manual
1/X sec. is the camera’s maximum flash sync speed.
If you use the <Z> or <Y> shooting mode, the result will be th e same as flash sh ooting
with <V> (Program AE) mode.
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Switching Flash Coverage
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Flash head (normal position)
The Guide No. is 22/72 (ISO 100 in meters/feet). The
maximum flash coverage matches an EF 28mm wide
angle lens (EF-S 18mm).
Flash head (pulled forward)
See p.26 for guidelines about the flash shooting range.
The Guide No. is 27/89 (ISO 100 in meters/feet). The flash
coverage matches an EF 50mm (EF-S 32mm) or lenses
with longer focal length.
When shooting with a lens wider than EF 50mm (EF-S
32mm), the periphery of the picture may become dark.
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Bounce Flash Shooting
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By pointing the flash head toward a wall or ceiling, the flash will bounce off the surface
before illuminating the subject. This can soften shadows behind the subject for more naturallooking shots.
When the resulting picture is dark, set a smaller F
number (open the aperture) or increase the ISO
speed and try shooting again. The resulting
picture may also be dark if the wall or ceiling is too
far away.
The wall or ceiling should be plain white or nearly
white for high reflecta nce. If th e bounce surf ace is
colored, this may produce a color cast in the
resulting picture.
After shooting with bounce flash, be sure to
return the flash head to the forward-facing
Pull the flash head forward and
then tilt it upward to determine
the flash head angle.
Determine the best angle for bounce flash by taking test shots and checking the resulting
pictures on the camera LCD monitor.
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position and push the flash head back into its
original position.
Other Functions
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Auto Power Off
To save battery power, power will be turned off automatically after 90 sec. of idle use. Press
the camera’s shutter button to turn on the Speedlite again.
* Canceling the auto power off function is possible. (p.16)
AF-Assist Beam
When you press the camera’s shutter button halfway, the flash may fire repeatedly. This is
the AF-assist beam function that facilitates autofocus for dark scenes. Its effective range is
approximately 4 m/13.1 ft.
This function is available when using the Speedlite with an EOS DIGITAL camera that has an
external flash control function. Depending on the camera model, note that the firmware may
need to be updated.
Modeling Flash
Pressing the camera’s depth-of-field button will fire the flash continuously for 1 sec. This
enables you to see the shadow effects on the subject before flash shooting.
Do not fire the modeling flash more than 10 consecutive times. If you fire the modeling flash
10 consecutive times, allow the Speedlite to rest for at le ast 10 min. to avoid overheating and
deteriorating the flash head.
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Setting the Flash Functions by Camera Operation
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When the 270EX II is attached to an EOS DIGITAL
camera with an external flash control function, the
following settings are available through camera menu
operations. See the camera’s instruction manual for the
setting method and functions.
[Flash firing] (Enable*/Disable)
Set to [Disable] when you wish to use only the AF-assist beam.
[External flash func. setting]
• Flash mode (E-TTL II*/Manual flash)
Normally, use [E-TTL II]. [Manual flash] can also be set when not using autoflash.
- 1st curtain:This is the normal flash shooting mode in which the flash fires at the
- 2nd curtain:The flash fires right before the shutter closes.
- High-speed:This mode enables flash shooting at all shutter speeds. This is
• Flash exp. comp
You can adjust the flash output level in the same way as normal exposure
compensation.
• E-TTL II (Evaluative*/Average)
- Evaluative:Fully automatic flash shooting can be performed, from dark scenes
- Average:Metering is averaged for the entire scene.
timing when the shutter is fully open.
effective when you want to use aperture priority for fill-flash
portraits.
to fill-flash shooting.
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[External flash C.Fn setting]
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C.Fn-01: Auto power off (Enabled*/Disabled)
C.Fn-06: Quick flash w/continuous shot (Disabled*/Enabled)
C.Fn-10: Slave auto power off timer (60 minutes*/10 minutes)
During normal auto power off (C.Fn-01), the power turns off if no operations are
made within 90 seconds, but in slave mode, the power turns off if no operations
are made within 60 or 10 minutes.
C.Fn-11: Slave auto power off cancel (Within 8 hours*/Within 1 hour)
When the master unit has a function to cancel the auto power off on the slave
unit, the master unit can cancel the auto power off on the slave unit within eight
hours or one hour after the slave unit enters the auto power off mode.
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Wireless Flash Shooting
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T o perform wireless flash shooting, the camera or the S peedlite att ached to the camera must
have a master function. The 270EX II fires as a slave flash when controlled from a master
unit. For the detailed shooting method, refer to the instruction manual of the camera or the
Speedlite with a master function.
Set the camera or Speedlite as the
1
master unit.
Set the 270EX II as the slave unit.
2
Set the power switch of the 270EX II to <
Attach the 270EX II to the supplied
3
mini stand and position the flash.
Indoors, you can perform wireless flash shooting
using the reflection of the surrounding walls without
having to point the wireless sensor of the 270EX II
toward the camera. Position the 270EX II while
checking that it can fire.
SLAVE
>.
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Transmission channel
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You can use the flash regardless of the transmission channel (1 to 4) on the master unit.
Slave ID (firing group)
The slave ID is set (fixed) to group A. This cannot be changed to group B or C.
Auto power off on the slave unit
When the power switch of the 270EX II is set to <
automatically if no operations are made within 60 or 10 minutes (p.16 C.Fn-10).
If the master unit does not have a function for canceling the auto power off (p.16 C.Fn-11) on
the 270EX II, set the power switch of the 270EX II to <
The supplied mini stand is for use only with the 270EX II. Use with another flash may cause
the attached flash to fall.
SLAVE
>, the power of the flash turns off
OFF
> and then to <
SLAVE
> again.
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Using the 270EX II for Remote Control Shooting
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During Wireless Flash Shooting
The 270EX II can be used for remote control shooting with cameras compatible with Remote
Controller RC-1, RC-5, or RC-6. When wireless flash shooting is enabled, remote control
shooting is possible while changing easily the position of the 270EX II.
Example of using the flash for wireless flash shooting
" Point the 270EX II toward the camera
and press the remote release button.
# Point the 270EX II to the subject within
two seconds.
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Set the camera to <R> (Remote control
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1
shooting).
For the setting method, see the explanations about
the drive mode or remote control shooting in the
camera’s instruction manual.
Shade the eyepiece of the camera viewfinder so
that light does not enter.
Take the picture.
2
Check that the <Q> lamp is lit, point the remote
control transmitter toward the camera, and press
the remote release button.
BThe picture is taken after two seconds.
When wireless flash shooting is enabled and the
power switch on the 270EX II is set to <
270EX II fires.
Be careful not to cover the remote control transmitter or the wireless sensor of the
270EX II with your hand.
The remote control function has an operation range of about 5 m / 16.4 ft. fr om the fr ont of
the camera.
Check the shooting results while performing remote control shooting.
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SLAVE
>, the
Remote Control Shooting
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The 270EX II can be used for remote control shooting with cameras compatible with Remote
Controller RC-1, RC-5, or RC-6.
1 Set the camera to <R> (Remote control shooting). (p.20)
2 Take the picture.
Point the remote control transmitter toward the camera, and press the remote release
button.
BThe picture is taken after two seconds.
Bulb (Long Exposure) Shooting
When you press the
seconds. Press the
Be careful not to cover the remote control transmitter or the wireless sensor of the
270EX II with your hand.
The remote control function has an operation range of about 5 m / 16.4 ft. fr om the fr ont of
the camera.
Check the shooting results while performing remote control shooting.
remote release
remote release
button during bulb shooting, the shutter opens after two
button again to close the shutter.
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Troubleshooting Guide
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If a problem occurs, refer to this Troubleshooting Guide.
The Speedlite does not fire.
• Make sure the batteries are installed in the correct orientation. (p.5)
• If the <Q> lamp does not light after 30 seconds, replace the batteries with new ones. (p.5)
• Clean the electrical contacts of the Speedlite and the camera.
The bottom of the picture looks dark.
• You were too close to the subject. Keep at least 0.7 m/2.3 ft. away from the subject.
• If a lens hood is attached, remove the lens hood.
The periphery of the picture looks extremely dark.
• After shooting with the flash head pulled forward, be sure to return the flash head to its
original position before shooting again.
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The picture is really blurred.
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• When the shooting mode is set to <W> mode for a dark scene, a slow sync speed is
automatically set, and the shutter speed also becomes slower. Use a tripod or set the
shooting mode to <V>.
Remote control shooting does not work.
• Remote control shooting works only with cameras compatible with Remote Controller
RC-1, RC-5, or RC-6.
• Set the camera to <R> (Remote control shooting).
The slave unit flash does not fire.
• Raise the camera’s built-in flash.
• Set the power switch to <
• Point the sensor on the slave unit toward the master unit.