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11-29-2010, 11:00 PM   #1
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Mamya Sekor DX lenses

I thought I asked this some time ago but I cannot find any thread - so here goes again.
Can a Mamiya/Sekor SX lens be used on the K200D camera via the original Pentax M42 adapter?
The SX mount is described as being a Pentax Universal M42 Screw Mount with a locking pin.
Is this locking pin the same as the dreaded Ricoh pin?

11-30-2010, 01:12 AM   #2

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Mamiya SX lenses have an extra pin that allow open aperture metering with the Mamiya (and Sears) DSX and MSX cameras. They are "auto-only" lenses (no auto-manual switch) so you'll need to somehow (e.g. glue) the pin in to make the lens "manual-only".

The pin is inside the mount (not on the mount as the Ricoh pin) so it does not get stuck in anything.

But I found this thread that you may be interested in. It ain't pretty.
11-30-2010, 01:53 AM   #3
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Yes, the protruding ring is the problem.
Either you shave them or you cannot get infinity focus.
It's a pity, they are nice lenses.
11-30-2010, 03:30 AM   #4
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The protruding ring on my 135 SX won't even allow it to MOUNT on my Pentax adapter, and I've been too lazy to Dremel it down.

12-02-2010, 07:36 PM   #5
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It's a pity, they are nice lenses.
SOldBear, blende8, Ira - That says it all.
Thanks guys for the informative replies.

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