Canon EX-series Speedlites

Canon Speedlite Transmitter ST-E2

Weight: 3.5 oz. / 100g (Including battery)

Developed in conjunction with the Speedlite 550EX and the EOS-3 camera, this master control device for a wireless Speedlite flash system meets and exceeds professional and advanced amateur standards. Its dedicated transmitter controls an unlimited number of 420EX or 580EX Speedlites as slave units up to 33 ft. away outdoors and 49.5 ft. away indoors. It is mounted as a clip-on with shoe lock lever and locking pin.

Advanced Features, E-TTL Compatible

Compatible with E-TTL autoflash functions, groups of 580EX Speedlites are able to take advantage of High-speed Sync, FE Lock, Flash Exposure Bracketing, and Pre-flash evaluative metering.

Built-in AF-Assist Beam

The AF-Assist Beam automatically fires in low-light and low-contrast situations to assist the camera's autofocusing system.

Sets and Controls Flash Ratios*

Transmitter ST-E2 sets and controls all functions of its Speedlite 580EX slave units. Flash ratios, for example, are controllable between 2 groups of 420EX and/or 580EX Speedlites, over a six-stop range.

* Wireless E-TTL with full ratio control possible with EOS-1D, EOS 113s, EOS 10D, EOS Digital Rebel, EOS-1v, EOS-3, Elan 7/7E, Rebel Ti and Rebel K2.

High Speed FP Flash

High Speed FP (Focal Plane) flash for synchronization at all shutter speeds is available. Larger apertures can be used to obtain better background blur. Additionally, fill flash can be used for moving subjects in daylight.

Multiple Speedlites can obtain lighting effects not possible with a single Speedlite. Previous multiple Speedlite systems required cumbersome wires to connect the Speedlites and camera. This is no longer the case with EX Speedlites and an EOS SLR. Everything is now wireless as well as automatic.

Wireless flash works with one or more Speedlites 580EX II, 580EX, 430EX and 420EX as slave units. Speedlite 580EX II, 580EX or Speedlite Transmitter ST-E2 is attached to the camera and slave unit is positioned remotely. The on-camera Speedlite or Transmitter serves as the master unit which transmits wireless signals to an unlimited number of other Speedlites 580EX II, 580EX, 430EX or 420EX which serve as slave units. The master unit's flash can also be enabled or disabled, and when disabled, it can still transmit wireless optical signals.

E-TTL Wireless Autoflash Control

Up to three groups (for main, fill, and background flash) of slave units can be set up for optimal, complete control of lighting. The slave unit's ID is set to A, B, or C. The flash output ratio between two Speedlite groups can be adjusted automatically from 8:1 to 1:1 or from 1:1 to 1:8. The flash output of the C Speedlite group can be adjusted through flash exposure compensation. The E-TTL autoflash system controls the total flash output to obtain a correct exposure. Also, when Speedlite 580EX is used with the EOS-1Ds, EOS-1D, EOS 10D, EOS Digital Rebel, EOS D60, EOS D30, EOS-1v, EOS-3, Elan 7/ 7E or Rebel Ti, you can fire a modeling flash for 1 sec. at 70Hz, by pressing the depth-of-field preview button to preview the flash effects before taking the picture. Even with multiple Speedlites, the modeling flash fires according to the flash ratio you have set.

E-TTL wireless autoflash can also be used with most other Speedlite features, such as FE Lock, FP Flash, Flash Exposure Bracketing/Compensation, and Stroboscopic Flash. Finally, for macro shooting, the Macro Ring Lite MR-14EX and Macro Twin Lite MT-24EX can be used as master units as well.

Speedlite Transmitter ST-E2

Instead of using a Speedlite 580EX II as the on-camera master unit, this wireless transmitter can be used. The ST-E2 can control up to two groups of slave units with ratio control between each group.

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