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Converting Zeiss QBM to PL


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The Rollei QBM Mount has a FFD of 44.6mm, so you run into all the same problems you would have with converting most stills lenses to PL. I haven’t seen the eBay listings, but it is possible that the lenses are small enough to fit inside of a PL mount and therefore can be recessed into the mount to make the FFD work. There are some  M42 lenses which can be adapted in the same way, mostly Russian glass.

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  • 2 years later...

Hi,

I talked with this guy who sells these DIY converted lenses, he said he could do the conversion, altho I never tested lenses that he converted.

https://www.ebay.co.uk/itm/165241256518?hash=item2679257a46:g:xuAAAOSwoNVhvwxx

Bought 35mm and 135mm f2.8 in qbm mount, disassembled them, but never took enough time to figure out how to do the conversion myself.

 

As far as the flange distance goes, yes, its too short, but the lenses are quite small. They fit inside pl mount, if you file enough. Also, looking to the photos of that qbm pl conversion in ebay, you could notice he does something to the aperture control ring.

Edited by Nojus Drasutis
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