Canon 2478A002 manual Wireless Multi-Flash E-TTL Autoflash Operation

45.Wireless Multi-Flash E-TTL Autoflash Operation

T h e r e a r e t w o t y p e s of wireless multi-flash E-TTLautoflash opcr- ations:

a< RATIO > O F F : All slaves fire the same flash output.

Q)< RATIO > ON: Slaves are given a n ID, e i t h e r A o r B. T h e f l a s h ratio is then set for each ID.

The flash ratio can be set only when

the camera is an EOS-3.

The flash ratio cannot be set with an EOS Elan IVIIE, EOS 50/5OE, EOS Rebel G/500N, EOS IX or EOS K71X Lite.

a By c h a n g i n g t h e d i s t a n c e between t h e subject a n d slaves, the lighting balance (flash ratio) can be changed accordingly.

Two or more slaves can be

used.

With the EOS-3, a modeling flash can be fired to check t h e lighting effects before the picture is taken.

As a n e x a m p l e , t w o s l a v e s a r e used here, one positioned on t h e left a n d t h e other on t h e right of the subject.

All t h e s l a v e s s e t a t t h e s a m e c h a n n e l fire a t t h e s a m e o u t p u t controlled by E-TTLautoflash t o obtain a correct exposure.

Thc operation ~rooedureis thc same a s with wireless I.>-'ITI,autoflash.

0 With the EOS-3, make sure the S T - E 2 ' s f l a s h r a t i o control lamp is off. (If necessary, press the <RATIO > button to t u r n i t off.) If t h e flash ratio control lamp is on, the Speedlite may not fire or a correct exposure m a y n o t be a t t a i n e d . A f t e r turning off the flash ratio con- trol lamp, set the main switch to <HOLD > to prevent the flash ratio control lamp from light- ing inadvertantly.

Sample Multi-Flash
Setup with Uniform
Flash Output	+%-

In t h e sample flash s e t u p shown below, t h e lighting on t h e left will be b r i g h t e r t h a n on t h e r i g h t of t h e subject.

Outdoors