on 4/25/02 6:11 AM, frieder.faig@xxxxxxxxxxxxxxxxxxxxxxxxx at
frieder.faig@xxxxxxxxxxxxxxxxxxxxxxxxx wrote:
snipped...
> 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.
It seems to me that you would want the film reflectance to be minimal, as
any light that is reflected from the film's surface is not activating the
film emulsion. That may be why the reflectance is within a narrow range, and
probably as low as can be economically achieved. If the film surface
reflected no light it would appear a dark black (I think) and all the light
would be absorbed into the emulsion. This would allow use of less silver, so
the film manufacturers must have tried to get as close to the optimal as
they can...
--
Jim Brokaw
OM-1's, -2's, -4's, (no -3's yet) and no OM-oney...
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