georgefun99 Offline Image Upload: On
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Aperture Priority...external 430 ex on ETTL, is it correct to assume that the internal light meter is calculating to INCLUDE the light from the flash at what it is set at?
I originally thought the same as you and also tried it. From my experience I believe the assumption is wrong. When using Aperture Priority mode the camera sets the shutter speed using ambient conditions ignoring the flash, that's why you had to "turn down" the flash with negative exposure compensation.
The way to get ETTL working best for you in this situation is to use Manual Mode, set both Aperture and Shutter speed yourself, then the ETTL will automatically compensate for the difference much more reliably. I use this often and usually get very good results. You will still need to adjust compensation on the flash depending on the background lighting situation, brighter backgrounds require brighter flash for balanced exposures.
The high contrast/high dynamic range situation is the hardest to manage and where the more experienced photographers really stand out against "the rest of us". I will consider myself Semi-Pro until I have mastered these more difficult lighting situations, my friends consider me a Pro but I know that I am still learning and think of myself as a relative newbie on this site of masters.
Doug's comments are great, he knows this stuff.
Also, not sure I "get" why you'd make that adjustment in the flash if you could just do it in the camera.
The answer to that comment/question combo depends on which body you have, and is your 430EX the first version or the newer version II?
(The 430EX-II and 580EX-II can be fully controlled in the camera menus on the newer bodies, 40D+50D, XSi, 1DS MK-III to name a few).
Edited on Nov 10, 2008 at 02:37 PM · View previous versions
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