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Peter Moretti

Flange Focal Distance of B4 Mount?

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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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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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