Re: Question about Mamiya 500 DTL and Lenses

[Ed Matthew]

The Mamiya

M42 mount cameras had a open aperture metering system which not only was
different than that adopted by Pentax but could cause damage to the exterior
of a Pentax camera if they were mounted.

The above statement applies only to those Mamiya lenses that were 'redisgned' for the DSX and MSX series. The lenses originally sold with the 500DTL and 1000DTL were simply single pin stop-down metering lenses. There was no problem with those. The 500DTL/1000DTL and their predecessors, the 500TL and the 1000TL were capable of stop=down metering only.

Also I believe that the Mamiya lenses lacked
an auto manual switch which would make their use with a K-M42 adapter good only
at maximum aperture unless you wish to preform some custom surgery on the lens.
(I could be mistaken about that last point as I haven't looked at any of these
lenses or cameras in a while).

You are mistaken. The Mamiya/Sekor lenses as referred to above did have the auto/manual switch.

Regards,
Ed Matthew


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