M25 but 0.75 or 0.5 pitch? Schneider-Kreuznach Componon 50mm f/4 enlarging lens

Chan Tran · 2025-08-10T14:39:55-0400

I have this lens and want an adapter to mount on the Nikon F bellows (Nikon PB-6). I know it's 25mm but what's pitch. I see adapter from M25 to Nikon F but 0.75mm pitch and the M25 to M39 adapter has 0.5mm pitch. I suspect that it is 0.5mm but want to make sure.
Thanks,

mshchem · 2025-08-10T15:37:02-0400

They made 25mm to 39mm adapter plates for these enlarging lenses.

runswithsizzers · 2025-08-10T17:26:20-0400

All of the M25 thread enlarging lenses shown on this website are M25x0.5 (including Schneider-Kreuznach):

Photo Cornucopia

Chan Tran · 2025-08-10T18:00:51-0400

runswithsizzers said:
All of the M25 thread enlarging lenses shown on this website are M25x0.5 (including Schneider-Kreuznach):

Photo Cornucopia

That's what I thought. So I have to use a M25 to M39 adapter along with the M39 to Nikon F adapter. They make M25 to Nikon F adapter but only in 0.75 pitch.

runswithsizzers · 2025-08-10T18:12:25-0400

You might look at this website for a machinist in Portugal. He has several stock adapters, and I believe will do custom work, too. I bought an adapter from him a few years ago -- it took a while to get it, but it was very nicely made:

Macro Adapters for Schneider Lenses | Custom Photo Tools

Adapters for Schneider lenses with for macro photography

customphototools.com

M25 but 0.75 or 0.5 pitch? Schneider-Kreuznach Componon 50mm f/4 enlarging lens

Chan Tran

mshchem

runswithsizzers

Chan Tran

runswithsizzers

Macro Adapters for Schneider Lenses | Custom Photo Tools

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