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 ?