> Hmmmm, not sure what you mean there. How can a simple optical slave be > an advanced slave?
The Lite-Link and the Nikon SU-4 are "smart" slaves that synchronize to the beginning and the END of a TTL flash pulse. There now exist "smart" slaves that ignore preflashes common on E-TTL and digital cameras. The "simple" slaves will trigger off the preflash and trigger the strobe while the shutter is closed. E.g. Wein Digital Peanut Blocking occurs because the "simple" slaves use an SCR (silicon controlled rectifier). The SCR can be locked if the trigger voltage is continuous, instead of dropping out when the flash fires. My 430EZ does not exhibit SCR lockup. My 420EX and 550EX do. Cheers Julian Loke * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
