Flash Expsure

Started Feb 9, 2008 | Discussions thread
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Jim Engel
Forum MemberPosts: 66
Flash Expsure
Feb 9, 2008


Taking shots at a chamber of commerce expo with
lots of booths in High School gym with quite a bit of


EOS 350 D camera Speedlight 420 EX


Camera insists on treating flash as fill flash, which
means if I am in shutter priority it locks the lens wide
open. Thus no depth of field.

What I want it to do:

Ignore ambient light, measure the pre flash, set some
reasonable apture and make the exposure.

How do I make it work that way ?

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