View single post by richw
 Posted: Mon Jan 14th, 2013 05:40
richw



Joined: Wed Apr 11th, 2012
Location: Melbourne, Australia
Posts: 525
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 Robert, I don't have a D3100 but is it a possible ISO issue. Just thinking the max shutter speed if you are using a flash (and without setting Auto FP) the max shutter speed is probably 1/200 or 1/250 (it could even be set below this).

Is it possible that if you are shooting in Aperture mode the camera can't get the shutter speed up enough to cope with the ISO setting even if it keeps the flash at low power. I'm guessing when you go fully Auto the ISO goes fully auto (if you have a slow shuuter speed fixed for the flash that might get overridden as well) and the camera can therefore expose properly?

Just a guess! (based on similar experience in strong Aussie sunlight)