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Flange Focal Distance of B4 Mount?


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#1 Peter Moretti

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Posted 05 December 2010 - 02:10 AM

Does anyone know what the flange focal distance is for B4 mount lenses? I've searched the web pretty exhustively but have yet to find the number. I believe it is significantly longer than PL's 52mm.

Thanks much!
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#2 Brian Drysdale

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Posted 05 December 2010 - 09:09 AM

Checking, I came across 48mm being mentioned.

http://imagelabs.com/tools/index.php
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#3 Peter Moretti

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Posted 05 December 2010 - 09:08 PM

So this would seem to indicate that you can use PL glass on B4 cameras. I did not know that. I always thought the long back focus on 2/3rd's cameras prevented the use of PL glass w/ a straight mechanical adapter. But I could very well be mistaken.
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