Praktina to M42 conversion on an Isco-Göttingen Westanar .

[Kathmandu]

This conversion was done on an Isco-Göttingen Westanar 180mm f4.5 in Praktina mount.


Original Praktina mount held down by three screws and comes off easily.







Old Praktina mount on left-proposed new insert (aluminum ring thats of the same diameter as the Praktina mount insert) on the right. I drilled three holes in the insert by lining it up to the holes on the lens.








Please note that insert gets wider - the wider part is the part without any holes drilled. I screwed the insert down nice and snug.



I then capped it off with just the outer part of a M42 Tmount adapter. I screwed the TMount down (with the three set screws).I then mounted the lens on my camera via a M42 to Sony adapter.I checked for infinity focus and how the lens lines up on my camera (I like the focus marker up to the center of the camera). I have a little play room on my insert and can slide the T Mount to M42-in and out about 2mm-to adjust for infinity.

Register distance for Praktina is 50mm so that gives us room ,to adapt non destructively in this case.

The key hardware here was the insert-I found mine in an old desk drawer,and it fit perfectly.

[SVP]

Neat & clean, nice job!

[indianadinos]

[calvin83]

[STELYA]

Is there an adapter for EOS ?
I can lifto off my Praktina mount but then I loose numbers and markings that are on it...