>===SIGMA INSTRUCTION TEXT BEGINS=== > >AUTO POWER OFF > >To conserve battery power, the flash unit automatically turns itself off >when the flash is not used within approximately 90 seconds. To turn the >flash on again, depress the TEST button, or the camera shutter button >halfway. Please noe that "Auto Power Off" mechanism does not work with >wireless TTL flash mode, normal slave flash, and designated slave flash >modes. > >===SIGMA INSTRUCTION TEXT ENDS=== > >I haven't tried it but it looks like it won't self-power-off when used as a >slave. > >NOTE: In addition to all the wireless ETTL flash modes found on the 550EX, >this Sigma unit has some extra non-Canon off-camera slave modes that the >550EX doesn't have, in which it fires in response to any flash burst, as if >it were an ordinary "dumb" slaved studio flash unit (although it's actually >a little more complicated than that). That is, the Canon wireless ETTL >light-pulse protocol is not used in these extra slave modes, and in fact >when the EF 500 Super is in one of them, an ETTL preflash will cause it to >fire prematurely as you would expect with an ordinary slave. This is what >the manual means by "normal slave flash and designated slave flash modes". > >I guess this facility could be used to slave the EF-500 Super to other >cameras etc. However the existence of these modes doesn't affect the answer >to your question, because the device never self-powers-off in any slave >mode, Canon or non-Canon. > >IMHO all these bells and whistles make the lack of an external power source >connector an even more obvious design goof. > >--Ken S.
Ken, Thanks, so much for the info. This is the best info I've seen on this flash. This is the kind of data I would need to help make a decision about buying this flash. Most of the so-called reviews say nothing more than "It's just like the 550EX only cheaper". If you want to do a review of this flash I can host it on my web site. Darrell D. _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
