Canon CN-E30-105mm T2.8 L S Brochure (en)

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SPEEDLITE FLASHES
reflective subject, or the subject is not in that 
part of the frame – an assumption validated by 
distance information. The algorithm thus helps 
avoid chronic underexposure problems in such 
situations. These readings are weighted,  
averaged, and compared with the ambient 
light reading and the main flash output is then 
set and stored in memory. The E-TTL II, in effect, 
captures the subject as a “plane” and not as 
a “point.” As a result, EOS SLR cameras can 
help deliver consistent flash exposures even 
if the subject contains various colors and 
levels of reflection. The camera also allows 
the user to select an averaged metering  
pattern through custom function settings. 
TTL* – TTL (Through-The-Lens) is the standard 
flash exposure control mode used by the 
built-in flash units that come with some 35mm 
EOS film cameras. Unlike E-TTL or E-TTL II, TTL 
reads flash illumination reflected from the film 
during the exposure. When the camera is set to 
Program AE mode, TTL flash sets an aperture 
based on the ambient light level.
Flash Exposure Lock (FE Lock)
FE Lock adds Auto Exposure lock and Spot 
metering functions when shooting with EX-series 
Speedlite flashes and E-TTL compatible EOS 
cameras. The EX-series Speedlite flash’s  
pre-flash fires when the camera’s AE Lock button 
is depressed, storing a Spot meter reading of 
flash and ambient lighting data for up to 16 
seconds. This provides enough time to not only 
recompose the shot, but also alter the ambient 
light exposure for maximum creative control. 
FE Lock is extremely useful when you wish to 
recompose after focus lock or to place the main 
subject in a part of the frame not covered by 
one of the focusing points. It can also eliminate 
potential exposure errors caused by unwanted 
reflections from surfaces like windows or mirrors.
 
Adjusting Ambient Exposure in FE Lock**
After pre-flashing the subject with the FE 
Lock button, ambient exposure can be adjusted 
by turning the Quick Control Dial. The ambient 
exposure level is displayed on the exposure 
level scale in the viewfinder and on the external 
LCD panel. 
FP Mode***
FP (focal-plane) flash, or High-speed Sync, 
enables E-TTL and E-TTL II compatible cameras 
equipped with an EX-series Speedlite flash to  
synchronize flash at shutter speeds faster than the 
camera’s normal maximum sync speed. Even in 
bright daylight, for example, a fast lens can be 
used at a wide aperture to reduce depth-of-field 
and emphasize the subject. FP flash can be 
combined with E-TTL, E-TTL II, or FE Lock, and 
is available in all AE modes plus Manual.
Flash Exposure Compensation****
This setting adjusts flash output without 
changing the shutter speed or aperture. It’s 
a particularly effective way to fine-tune the 
balance between foreground and background 
exposure for fill flash shots, but it can also be 
used to compensate for extremely bright or 
dark tones in the subject.
Second-Curtain Sync
Instead of firing the instant the shutter 
opens, Second-Curtain Sync fires the flash 
at the end of the exposure, allowing streaks 
of light to flow naturally behind a moving 
subject. This creative flash mode is most 
effective with slower shutter speeds and 
subjects with light sources, such as the 
headlights of a moving car. 
Stroboscopic Flash
Stroboscopic flash is a series of flashes fired 
in rapid succession during a single exposure. 
With stroboscopic flash, multiple images of 
a moving subject appear in the photograph. 
Using this mode, you can analyze a golf swing 
or record the shattering of a windowpane. 
(Available with Speedlite 600EX-RT,  
Macro Ring Lite MR-14EX II, Macro Twin Lite 
MT-24EX, and the built-in flash of the  
EOS 7D Mark II). 
LED Light
In a first for Canon  
Speedlite flashes,  
the 320EX features 
a bright, built-in LED 
light for illumination 
when shooting video  
or for use as a  
modelling light. With fully charged AA  
batteries, the LED light can last for up to  
four hours of continuous use. 
Flash Release Function
Select Speedlite flash models include a 
convenient feature that enables photographers 
to release the camera shutter from the remote 
flash wirelessly with a 2-second delay. With 
EOS DSLR cameras that provide a master 
function with remote reception mode, this 
feature makes it possible to reposition the  
flash with complete freedom – even out of the 
camera’s line-of-sight and at some distance 
from the camera.
High-Speed Sync — EF 135mm f/2.0L USM lens • f/2 • 1/750 sec.
Taken with MT-24EX and EOS-1v HS
*  A-TTL and TTL are not compatible with DSLR cameras. See lens chart for a listing of lenses that supply distance information. **
 Ambient exposure cannot be adjusted when the camera is set to Bulb mode or in low-light  
situations when the camera is set to Program AE or A-DEP. ***
 Unlike conventional electronic flash, FP flash output (guide number) decreases as shutter speed increases above normal X-sync speed. **** Flash exposure  
compensation can be set with most current Speedlite flashes, and it can also be set with all current EOS cameras other than the EOS Rebel series and EOS Digital Rebel. 
 Not Linked to AF point. 
†† 
Requires EOS body that supports 
E-TTL and E-TTL II respectively. 
†††
 Defaults to TTL in all  
conditions except direct flash in the camera’s Program mode.
SLR Compatibility
Camera Model
E-TTL E-TTL II A-TTL / TTL
EOS-1D X / EOS-1Ds Mark III / EOS-1D Mark IV No
Yes
Not Possible
EOS 5DS / 5DS R
No
Yes
Not Possible
EOS 5D Mark III
No
Yes
Not Possible
EOS 6D
No
Yes
Not Possible
EOS 5D Mark II
No
Yes
Not Possible
EOS 7D Mark II / 7D
No
Yes
Not Possible
EOS 70D / 60D / 50D / 40D / 30D
No
Yes
Not Possible
EOS Rebel T6s/ T6i / T5i / T4i / SL1 / T3i
No
Yes
Not Possible
EOS Rebel T5 / T3 / T2i / T1i / XSi / XS
No
Yes
Not Possible
EOS Digital Rebel XTi / XT
No
Yes
Not Possible
EOS-1v / EOS-3
Yes
No
4-point/3-zone
EOS ELAN 7
ne
Yes
Yes
4-point/3-zone
EOS Rebel T2 / T2 Date
No
Yes
Not Possible
EOS Rebel K2 / K2 Date
Yes
No
4-point/3-zone
Speedlite Compatibility
E-TTL / E-TTL II
E-TTL / E-TTL II A-TTL TTL
Manual
600EX-RT
Yes
††
No
Yes
†††
Yes
580EX II
Yes
††
No
Yes
†††
Yes
430EX II
Yes
††
No
No
Yes
320EX
Yes
††
No
No
Yes
270EX II
Yes
††
No
No
Yes
90EX
Yes
††
No
No
Yes
MR-14EX II / MR-14EX
Yes
††
No
Yes
†††
Yes
MT-24EX
Yes
††
No
Yes
†††
Yes
E-TTL II – Available on Canon’s EOS DSLR cameras, 
E-TTL II incorporates distance information from 
compatible EF lenses (see page 34 for details) for 
more versatile flash exposure control. E-TTL II  
helps minimize underexposure that can occur 
with straight reflections by ignoring sensor areas 
that report abnormally high levels. This feature 
is useful when shooting a subject with a highly  
reflective object in the background, or if the  
subject itself is highly reflective. In addition, 
because distance information is used in  
calculating the flash output level, E-TTL II  
prevents overexposure when photographers  
lock focus and recompose. For example, with 
the EOS 5D Mark III, the ambient light is first 
measured using the camera’s 63-zone metering 
when the shutter button is pressed. Next,  
a pre-flash is fired and the metering sensor 
takes readings. The ambient and pre-flash  
readings are compared. The metering areas 
having small differences are selected as the 
main flash exposure areas. Areas with large 
discrepancies between ambient and pre-flash 
readings are excluded or down-weighted 
because they are assumed to contain a highly 
Sophisticated Flash Control Modes
E-TTL – In E-TTL (Evaluative Through-The-Lens) 
flash exposure control mode, meter readings  
are taken through the lens, but not off the focal 
plane. Using a pre-flash fired after the shutter 
button has been fully depressed – but before 
the camera’s reflex mirror goes up – E-TTL uses 
the camera’s Evaluative metering sensor to 
compare the ambient light values with the light 
reflected from the subject by the pre-flash. The 
camera then calculates and stores the flash 
output required for optimum exposure of the 
main subject (as identified by the AF point) and 
the background. E-TTL requires the use of  
EX-series dedicated Speedlite flashes such 
as the 600EX-RT, 430EX II, 320EX, 270EX II, 
90EX, MT-24EX, or MR-14EX II in combination 
with a compatible camera.
SPEEDLITE TECHNOLOGY
Integral to the EOS System, Canon Speedlite flashes are the ideal flash source 
for EOS cameras. They are technologically advanced to provide perfect exposure 
and illumination with just about any subject, yet operation is remarkably simple. 
Whether you’re an amateur or an expert, Canon Speedlite flashes can make it easy 
to obtain professional results.
Tyler Stableford
Explorer of Light
Never have I used  
such a versatile,  
powerful Speedlite  
system as the 600EX-RT 
Speedlite. Whether I'm 
shooting run-and-gun 
events or portraiture  
on location, the  
Speedlite flashes  
are as dependable  
as they get.
©Tyler Stableford