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Pitch for the Helios 40 lens? 66mm x 0.75?
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I am going to make a few stepup rings for the Helios-40 85/1.5, such that more common 67mm filters can be used, but I do not have a lens around to check the filter thread.

So ... does anyone know the pitch ? 66mm x 0.75 ?


Last edited by hk300 on Tue Feb 09, 2010 3:29 am; edited 1 time in total


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dunno, but here's "How to Measure Screw Threads" with a photography orientation:

http://www.skgrimes.com/adapter/measure.htm


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siriusdogstar wrote:
dunno, but here's "How to Measure Screw Threads" with a photography orientation:

http://www.skgrimes.com/adapter/measure.htm


LOL ... i don't have the lens here.


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66mm? I thought its lens size is 49mm or 52mm. There are some othions of Helios 44. Check this. Mike
http://www.commiecameras.com/sov/35mmsinglelensreflexcameras/lenses/index.htm


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djmike wrote:
66mm? I thought its lens size is 49mm or 52mm. There are some othions of Helios 44. Check this. Mike
http://www.commiecameras.com/sov/35mmsinglelensreflexcameras/lenses/index.htm


sorry i made a typo, it is Helios-40.


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hk300 wrote:
djmike wrote:
66mm? I thought its lens size is 49mm or 52mm. There are some othions of Helios 44. Check this. Mike
http://www.commiecameras.com/sov/35mmsinglelensreflexcameras/lenses/index.htm


sorry i made a typo, it is Helios-40.

NP. So you have answer from this site. There are M39 and M42 versions. Mike


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djmike wrote:
66mm? I thought its lens size is 49mm or 52mm. There are some othions of Helios 44. Check this. Mike
http://www.commiecameras.com/sov/35mmsinglelensreflexcameras/lenses/index.htm


THANKS MIKE ...

It has the details for the Helios-40 ... it is 66x0.75!


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count me in ALex, I need that too!


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I could send you one of the filters if need be. If I get a chance tomorrow I will buy a guage and measure mine. Would love to have the step down ring you are making.