Durst 75mm M609 Recessed Lensboard for 50mm lens & M39/Leica Mount

thingiverse

I got a Durst M609 enlarger that came with a 105mm lens, which is less than ideal for enlarging 35mm negatives. I bought a 50mm lens on eBay, but the lensboard that came with my enlarger was the wrong thread size. This does 2 things - it supports a standard Leica M39 mount, which most enlarger lenses work - it recesses the lens back into the enlarger. A 50mm lens with a flush lensboard won't be able to focus, since the lens can't get close enough to the negative. It should also work for other Durst enlargers with a 75mm lensboard.