Thanks for the links to the flash brackets. The T28 does not work well with
non TTL auto for OM-2---I found the instruction booklet on-line. Some of the
hardware can block the sensor and they say it does not correct for
magnification. My macro books all assume one is using dig TTL. I wonder how
to correct for extension tubes. If one corrects for magnification, does that
take care of the reduction in light form the extension. Let's say one has a 25
mm ext with a 50 mm lens. That is a 1/2 inc in mag which I think is approx 9/4
stop reduction, if I remember correctly. I typically bracket the fill for
heavy overcast days and 1 often is OK, though not always the one with the best
focus.
Mike
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