At 11:20 AM 12/27/2002 -0800, Tal Lancaster wrote:
I was shooting with my OM2n in rather sunny conditions. I kept noticing
that my meter would drop a couple of stops the closer I brought my eye
into the eyepiece. It was acting like the light was reflecting off my
face back into the eyepiece and effecting the meter readings.
Is the normal behavior?
Is this the reason people use eyepiece cups?
One of the reasons, yes. This phenomenon is not unique to the OM-1 and its
variants -- all older TTL metering SLRs did this. I've experienced the
same problem with the Canon Ftb, older Nikons, older Pentaxes (Spotmatic
comes to mind), etc. Newer SLRs do not read all the light coming off of
the primary mirror, but use a secondary mirror (or some other arrangement)
to ensure that the only light getting to the meter is the light coming
through the front objective, instead of every opening in the system.
Garth
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