Film reflectance is not so much different between films. Today
OTF-flash-control is state-of-the-art-technology. With flash,
1000f the reading is done on the film.
When film refectance would change, not only the OM4 would be
troubled, all modern cameras couldn`t handle flash anymore.
Film reflectance is a issue for testing guy`s but not for practical work.
The difference it nomimnal and real film-sensivity already outweight
this problem.
Frieder Faig
That is not really true. If you consult the archives as I just did
you will find discussion of this issue. Before Gary Reese did his OM
lens tests he also measured the reflectance of various films and
found at least a 1 stop difference, if I remember correctly, between
the highest and lowest. It would not make a difference when most of
the exposure is being calculated off the curtain, but would be
significant at 1/60 and slower.
--
Winsor Crosby
Long Beach, California
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