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<blockquote data-quote="WayneF" data-source="post: 212476" data-attributes="member: 12496">Yes, that would be the usual case... optical slaves simply cannot be triggered in sync from automatic flash.&nbsp; Because the preflash triggers them too early, before the mirror goes up and the shutter is&nbsp; opened.Set your triggering flash to manual flash mode, and it will work.&nbsp; The slave is manual anyway.&nbsp; This manual trigger flash normally could be set to a very low level if you did not want it to interfere (contribute) with the picture.Some (a very few) slaves have a option, to ignore the first flash (preflash from digital automatic TTL flash), and instead to trigger on the second flash seen.&nbsp; This can work then, but the automatic flash will be its usual full value (as opposed to a low level trigger).&nbsp; That can work with normal hot shoe TTL flash, but it still has no hope of working with the more complex Commander system.</blockquote>

[QUOTE="WayneF, post: 212476, member: 12496"] Yes, that would be the usual case... optical slaves simply cannot be triggered in sync from automatic flash. Because the preflash triggers them too early, before the mirror goes up and the shutter is opened. Set your triggering flash to manual flash mode, and it will work. The slave is manual anyway. This manual trigger flash normally could be set to a very low level if you did not want it to interfere (contribute) with the picture. Some (a very few) slaves have a option, to ignore the first flash (preflash from digital automatic TTL flash), and instead to trigger on the second flash seen. This can work then, but the automatic flash will be its usual full value (as opposed to a low level trigger). That can work with normal hot shoe TTL flash, but it still has no hope of working with the more complex Commander system. [/QUOTE]

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