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04-01-2014, 09:28 AM   #16

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QuoteOriginally posted by Not a Number Quote
How about taking two generic K-mount to M42 adapters and soldering them together? The flanged ones will give you more surface to solder together. Depending on the material you might even be able to spot weld the flanges together. Or drill holes and bolt them together Flange A ] [ Flange B
The bayonet sides would need to be stuck together, not the flange side (which is the m42 mounting side). Flanges would go out. Still, could work.

04-01-2014, 11:00 AM   #17
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No, I can put my OEM Pentax M42 adapter on backwards. It screws in with no problems. A nut can be screwed on a bolt from either side of the nut. Just be careful that the auto/manual pin doesn't get stuck on the K flange. But there is plenty of room that you can get a thumbnail in there to depress the pin. I would remove the screw and spring clip if there is one though.

It doesn't have have to be a K mount as long as the threads go all the way through like this Canon adapter
Vello M42 Mount Lens to Canon EOS Camera Adapter LA-CEF-M42 B&H

Last edited by Not a Number; 04-01-2014 at 11:12 AM.
04-01-2014, 11:26 AM   #18
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M42 teleconverters are cheap. Purchase 2 of them and cannibalize as required. Or,mom ply get two flanged M42 to k mount adaptors
04-01-2014, 02:13 PM   #19
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Can't you just take two used cheap filters and remove glass and sand off anodization and epoxy together, or make w/ two step up or step down rings, or a combination of these. Two step down rings may give the strongest bond--larger surface area.

---------- Post added 04-01-14 at 02:15 PM ----------

OH, I was thinking 42mm but not M42.. Ignore my post.

04-01-2014, 02:22 PM   #20
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Teleconverters sounds like a viable idea. The mount on either end probably have holes drilled in the same relative places so you probably just replace the male end with a female. The question would be how big of an opening would there be in the tube even with the glass removed. You may have substantial vignetting.
04-01-2014, 07:45 PM   #21
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Or make your own from duct tape and epoxy. But seriously, I'd take up Wombat on his offer...
04-02-2014, 06:02 AM   #22
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Here is the new adaptor.

(Taken with the newly restored K 1:2.8 24mm just back from dcshooter, and the ist ds)
I mean, what better camera / lens combo could you ever have ! )

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04-21-2014, 12:08 PM   #23
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I wanted to update this thread with a picture.

Thanks to wombat2go I was able to complete my DSLR scanning setup and start converting film negatives into digital positives. I found a great tutorial for doing the conversion in Apple Aperture.

my infinite wisdom: Inverting DSLR-Scanned Negatives in Aperture

It takes some work and I need to practice the process more to understand the interactions between the various adjustments. Here's a shot that I processed yesterday.

by Never Off, on Flickr

It's far from perfect but it's a start.

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