Thingiverse
Praktica B to M42 conversion (focus to infinity) by Spotmatic
by Thingiverse
Last crawled date: 3 years, 4 months ago
This is a non-destructive conversion of a Praktica B mount lens to M42 screw mount. The converted lens will allow you to focus to infinity.
Glue the two parts 1 and 2 together with Loctite Super Glue Precision.
There are two version of the M42 screw mount, try them out to see which one fits best. In my hands, the M42 version aligned the distance marker perfectly on my Spotmatic but with the Contax/Yashica M42 adapter I needed to adjust the mount a little bit in order to get a good alignment.
Glue the two parts 1 and 2 together with Loctite Super Glue Precision.
There are two version of the M42 screw mount, try them out to see which one fits best. In my hands, the M42 version aligned the distance marker perfectly on my Spotmatic but with the Contax/Yashica M42 adapter I needed to adjust the mount a little bit in order to get a good alignment.
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