hsma Senior Member 262 posts Joined Nov 2007 More info | May 15, 2008 02:41 | #1 I just picked up some cactus wireless triggers and after playing around with them, I was getting way over exposed pictures. The 580 was in ETTL. I know ETTL is effective when its on the hotshoe but is it still effective when its off camera? Does the ETTL still work effectively off camera? 40D + Grip, XTi + Grip, 70-200 2.8 IS, 17-55 2.8 IS, 50 1.8,
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xdavex70 Mostly Lurking 15 posts Joined Jan 2008 Location: Scotland More info | May 15, 2008 03:31 | #2 The triggers are just that....a trigger. They will not enable off camera ETTL. This post explains what you need to do this...
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JakeWilliams Mostly Lurking 19 posts Joined Mar 2008 More info | May 15, 2008 03:32 | #3 e-TTL can work with the speedlite flashes but from what I found out you need an e-TTL enabled transmitter. I use the canon wireless flash transmitter for this very reason and although it is a bit more costly I've been getting perfect exposure with my 430's.
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form "inadequately equipped"  4,929 posts Likes: 13 Joined Jan 2006 Location: Henderson, NV More info | May 15, 2008 09:43 | #4 It will fire the 580EX at full power every time if ETTL is set. Use manual. Las Vegas Wedding Photographer: http://www.joeyallenphoto.com
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May 16, 2008 02:42 | #5 Thanks for the clarification guys. 40D + Grip, XTi + Grip, 70-200 2.8 IS, 17-55 2.8 IS, 50 1.8,
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