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

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Wireless Radio Control
For sophisticated wireless flash setups, the 
Speedlite 600EX-RT and the Speedlite 
Transmitter ST-E3-RT represent the next 
generation in wireless flash systems. In 
addition to 
traditional 
optical 
wireless 
transmission, 
both the 
Speedlite 
600EX-RT and 
the Speedlite Transmitter ST-E3-RT facilitate 
radio controlled, two-way wireless 
transmission up to 100 feet, among up to five 
groups or 15 individual Speedlite flashes. 
Communicating on 2.4 GHz frequencies for 
radio transmission, radio controlled flash 
systems do not have the same directional 
limitations of traditional wireless optical 
transmitters. Where other wireless systems’ 
signals can be interrupted with physical 
obstacles, radio controlled systems excel. To 
avoid interference with other equipment on the 
same frequency, 15 transmission channels are 
available, selectable manually or 
automatically, and radio transmission IDs can 
be set to prevent misfiring in the event of 
signal interference on the same channel. With 
diverse flash metering options, and a number 
of flash modes all accessible from the menu 
and quick control screens of select EOS 
cameras, the Speedlite 600EX-RT and the 
Speedlite Transmitter ST-E3-RT make complex 
lighting setups simple. With compact, weather 
sealed and reliable designs, combined with 
improved information panels and controls, 
The Canon EX-series Speedlite flashes have made multiple-flash 
photography simple, wireless and automatic. Using the Speedlite 
600EX-RT, Macro Ring Lite MR-14EX II, or Speedlite Transmitters 
ST-E2 or ST-E3-RT as a master unit, wireless signals are 
transmitted to numerous Speedlite flashes, creating myriad 
possibilities for lighting, no matter the location. Select  
EOS cameras have Integrated Speedlite Transmitters, allowing 
users to wirelessly control EX-series Speedlite flashes and doing 
away with the need for an external master unit. The Speedlite 
600EX-RT and the Speedlite Transmitter ST-E3-RT use two-way 
radio signals in addition to traditional wireless.
Wireless Flash Photography
Speedlite 600EX-RT and the 
Speedlite Transmitter 
ST-E3-RT are indispensible, 
eminently adaptable tools 
for advanced, professional 
flash photography.
E-TTL/E-TTL II Wireless  
Autoflash Control
Up to three groups (for main, fill and 
background) of slave units can be set up for 
comprehensive control of flash lighting. The 
Speedlite flash slave units can be assigned to 
group A, B, or C, with output ratio between 
groups A and B adjustable from 8:1 to 1:1 or 
1:1 to 1:8. The output of the group C can be 
adjusted through flash exposure 
compensation. Superb lighting is simple 
thanks to the E-TTL/E-TTL II autoflash system 
which controls the total flash output to ensure 
consistently correct exposure. Select EOS 
cameras with Integrated Speedlite 
Transmitters can control and trigger external 
Group firing mode
Group Firing
1
 – Set different flash modes for each group 
(A, B, C, D, and E) and perform multiple wireless flash 
shooting. Two or more units can be set as the same group.
Linked shooting function – Releases the camera that has the 
Speedlite 600EX-RT (or Speedlite Transmitter ST-E3-RT) set 
as the master unit and release up to 15 cameras with the 
Speedlite or transmitter set as slave units. 
A
B
C
E
D
ETTL II
Manual flash
ETTL II
Transmission distance
Approx. 30m/98.4 ft.
Manual flash
Auto external metering
Ceiling
Master unit
camera
Transmission
distance
Approx. 30 m
(98.4 ft.)
Fig-06_R_Linked_shooting_E.eps
Fig-04_R_Group_flash_example.eps
A
B
C
E
D
ETTL II
Manual flash
ETTL II
Transmission distance
Approx. 30m/98.4 ft.
Manual flash
Auto external metering
Ceiling
Master unit
camera
Transmission
distance
Approx. 30 m
(98.4 ft.)
Fig-06_R_Linked_shooting_E.eps
Fig-04_R_Group_flash_example.eps
 
Group firing mode is supported by the EOS-1D X, EOS 5D Mark III and later camera models. In earlier camera models, all flashes will switch to E-TTL automatically and group control is reduced to 3 groups.
Speedlites wirelessly through their built-in 
pop-up flash. The EOS 7D Mark II camera can 
control A, B, and C groups and also has a 
modeling flash feature for previewing the 
output of your external Speedlite flashes, 
available by pressing the depth-of-field 
button. Even with multiple Speedlite flashes, 
the modeling flash fires according to the ratios 
you have set. E-TTL/E-TTL II wireless autoflash 
also supports other Speedlite flash features 
including FE Lock, FP Flash, Flash Exposure 
Bracketing/Compensation, and Stroboscopic 
Flash. Finally, for macro shooting, the Macro 
Ring Lite MR-14EX II and Macro Twin Lite 
MT-24EX can be used as master units as well.
usa.canon.com/eos  
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SPEEDLITE FLASHES
Speedlite
Amazing Flash System
Canon offers a full range of Speedlite flash units compatible with EOS System cameras for a wide 
variety of applications and photographers’ needs. They range from simple, economical flashes to 
high-power, highly advanced Speedlite flashes for professional use.
Speedlite 430EX II
•  Superb build quality, including a metal foot for added 
strength.
•  Approx. 20% faster recycle time, compared to  
previous 430EX.
•  One-touch quick-lock mechanism for easy  
attaching/detaching flash from camera.
•  Full flash control possible on camera menu, with 
compatible EOS DSLR cameras.
• Virtually silent flash recycle.
• Full 180˚ swivel in either direction.
•  Zoom flash head covers range of 24–105mm; max. 
Guide No. 141 ft./43m at ISO 100.
Speedlite 320EX
•  Built-in LED illuminates nearby subjects in  
dim light – especially useful for video.
•  Versatile vertical and horizontal bounce capability.
•  Flash release function allows wireless shutter 
release from the flash with a 2-second delay for 
flash repositioning.
•  Wireless Slave function supports three groups and 
four channels.
•  Two flash coverage settings, selectable by  
extending or retracting flash head.
•  Max. Guide No. at Tele setting: 105 ft./32m at  
ISO 100.
•  Fast recycle time of approximately 2.0 seconds.
Speedlite 270EX II
•  Ultra-compact, ultra-lightweight flash unit.
•  Vertical bounce capability up to 90 degrees.
•  Flash release function allows wireless shutter  
release from the flash with a 2-second delay  
for flash repositioning.
•  Slave function allows the flash to be  
triggered wirelessly.
•  Flash coverage can be switched between Normal 
and Tele settings.
•  Max. Guide No. at Tele setting: 89 ft./27m at  
ISO 100.
Speedlite 90EX
•  Ultra-compact, ultra-lightweight flash unit.
•  Easy and intuitive operation.
•  Wireless master function (optical) allows  
multiple flash units to be controlled for  
creative lighting effects.
•  Supports 24mm wide-angle lenses  
(35mm equivalent).
•  Max. Guide No. 30 ft./9m at ISO 100.
Speedlite 600EX-RT
•  Wireless multiple flash system uses radio wave  
communication for enhanced control of up to five 
groups and 15 individual flash units.
•  Zoom flash head covers range of 20–200mm;  
maximum Guide Number (197 ft./60m at ISO 100).
•  Improved flash output consistency.
•  Improved flash head durability, and outstanding  
dust and weather resistance.
•  AF Assist Beam compatible with Canon’s 61-Point 
High Density Reticular AF.* 
•  Dot matrix LCD panel and backlit button  
provide easy visibility.
•  Fully swiveling head, 180° in either direction.
* Feature compatible only with EOS-1D X and EOS 5D Mark III.