I would guess that your meter is fine. It may be that the SC lenses are
actually transmitting less light than the MC lenses. One of the benefits of
MC vs SC is supposedly better light transmission. As an example I have a
Soligor 200 f/2.8 that is really much closer to f/3.5 or so.
A better test would be to meter through the camera and shoot some slides
with the lenses to make comparisons. I suspect the slides will be similarly
exposed.
Jim Couch
Robert Gries wrote:
> John H. and I have had a frustrating time with a couple OM-1 bodies and
> meter accuracy. He mentioned that others on the list have had problems
> with certain lenses and the accuracy of the OM-1 meter.
>
> With the lenses that I have available, it seems that the SC lenses are
> the ones giving me grief. Using an evenly lit surface, the meter
> inaccuracies are as follows:
>
> 21/3.5 (MC) meter is right on - agrees with hand held meter
> 35 shift (SC) 1.5 stops over - this is after I let the meter "settle"
> 85/2 (MC) meter is right on
> 135/2.8 (SC) meter is about 1 stop over.
>
> I still need to go home and check this with my other lenses, but thus
> far is there anything mechanically different between older and newer
> versions of these lenses that would cause this? I have not had any
> problems with these lenses and the -4Ti, so I am guessing it might be
> more with the OM-1 meter, and not the lenses.
>
> Any and all information is greatly appreciated.
>
> Bob Gries
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