Canon Speedlite Transmitter ST-E2 Instruction manual - Page 11

45. Wireless Multi-Flash E-TTL Autoflash Operation There a r e two types of wireless multi-flash E-TTL autoflash opcr- aations: All the slaves set a t t h e same < RATIO > OFF: All slaves fire channel fire a t t h e s a m e o u t p u t Sample Multi-Flash Setup with Uniform the same flash output. Q)< RATIO > ON: Slaves are given a n ID, either A or B. The flash ratio is then set for each ID. The flash ratio can be set only when controlled by E-TTL autoflash to obtain a correct exposure. Thc operation ~rooedureis thc same a s with wireless I.>-'ITI, autoflash. Flash Output In the sample flash setup 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 +%- the camera is an EOS-3. The flash ratio cannot be set with an 0 With the EOS-3, make sure the ST-E2's flash ratio control the subject. EOS Elan IVIIE, EOS 50/5OE, EOS Rebel lamp is off. (If necessary, press aG/500N, EOS IX or EOS K71X Lite. By changing t h e distance the button to turn it off.) If t h e flash ratio control lamp is on, the Speedlite may between the subject and not fire or a correct exposure slaves, the lighting balance may not be attained. After (flash ratio) can be changed turning off the flash ratio con- accordingly. Two or more slaves can be trol lamp, set the main switch to to prevent the flash used. With the EOS-3, a modeling ratio control lamp from lighting inadvertantly. Outdoors flash can be fired to check the lighting effects before the picture is taken. As a n example, two slaves a r e used here, one positioned on the left a n d t h e other on t h e right of the subject.