>Using an OM4T with a 90/f2 and a 50/f1.2 my camera mounted F280 failed
>to fire on several occasions where there was bright backlighting but the
>subject matter was in dark shade ...... people standing in a poorly lit
>room against opened doors leading to a brightly sun lit exterior. The
>distance from flash to subject was circa 12 feet. I had the flash set to
>"normal" [because the shutter speed recorded less than 1/60 second], the
>aperture set to ~f5.6, and the camera set to auto and I was using 160
>ISO Portra. The subjects were framed within the centre of the
>viewfinder. Can anyone suggest why the F280 failed to fire. It was
>properly fitted into the shoe on the camera, I was using new batteries,
>and the charge light was lit up.
>
>On all occasions when there was less intense back lighting the F280
>fired but then I was using Super FP mode.
>
>John Hudson
>Vancouver, BC<
I've had the same experience with an OM-4Ti and the T45. Don't know why.
Probably the bright background fools the camera into figuring there's
enough light without the flash.
Walt
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