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[OM] f stop adjustments with F280 flash

Subject: [OM] f stop adjustments with F280 flash
From: "John Hudson" <13874@xxxxxxxxxx>
Date: Tue, 21 Jan 2003 11:16:30 -0400
The close up image I posted of our young cat was taken with an OM4T / 90mm
f2 macro / F280 flash on camera. The camera to subject distance was about
three feet.

The aperture used was f5.6 or f8 and the exposure mode was set to "Auto". On
a gut feeling that the proximity of flash to subject was abnormally close I
dialled up a minus 1 exposure factor on the camera. The density of the
negative looks OK.

My question is ........ did dialling up a minus 1 exposure factor have any
impact on the exposure of the negative? When used without flash the minus 1
dial up would result in a one stop under exposure. When exposing with F280
flash does the interaction of the camera with the flash gun override any f
stop compensation one may have set?

John Hudson







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