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01-29-2015, 11:25 AM   #1
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Does a K-mount to M42 Adapter exist?

I know that adapters exist allowing M42 lenses to be mounted on K-mount bodies, but I'm wondering if the opposite exists (I assume it would).

The reason is a local shop has an NX Mini on sale for stupidly cheap (It was the display model, its going for under $200), and I'd love to be able to give it the "Q telephoto treatment" if I can mount my old Pentax K-mount lenses on it, but there doesn't seem to be an NXM -> K mount adapter out there, but there IS an NXM -> M42 adapter.

I figure I could just go NXM -> M42 -> K-mount, but a way of making the M42 to K-mount jump is eluding me.

01-29-2015, 11:29 AM   #2
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No. It would be impossible without optical correction. The K-mount is wider than 42mm.
01-29-2015, 11:50 AM   #3
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I think you could go K->NX->NXM, but the adapters will cost more than the camera...
01-29-2015, 12:12 PM   #4
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Are you sure there's an M42->NXM adapter? All I can see are M42->NX and NX->NXM adapters.

01-29-2015, 12:18 PM   #5
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I may have my arrows backwards. I can see adapters where I can stick an M42 on the Mini, but not a K-mount. I'd need some way of kludging a K-mount to the Mini, probably via two adapters of some sort.
01-29-2015, 12:26 PM   #6
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PreciseParts - Custom Adapters for Astronomy

These guys can fabricate one for you, at around $193 US. It would also act as an extension tube with a minimum of around 20mm.
01-29-2015, 03:16 PM   #7
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QuoteOriginally posted by Not a Number Quote
These guys can fabricate one for you, at around $193 US. It would also act as an extension tube with a minimum of around 20mm.
That could be done by yourself, with glue in RioRico style (a K mount from an old extension plus an adapter "any->NXM").

I don't think glass would be needed, as the register distance of NXM will be certainly much smaller than of the K mount.
So an "extension tube" must be there anyway to adjust for the difference,

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