Krokus 66 color sl lens thread?

[petersandford]

I've been doing a search around the net to try and find the answer to the question of what size of thread is on the Krokus 66 color sl lens thread. I’ve found a few places that said m42 but also came across a few that said m39 so before i buy a lens i thought I’d make sure

 

[zozur]

Hello
Most if not all Krokus enlargers have m42 thread. If you have it just measure this. Most enlarging lenses are m39, but even if enlarger take m42 you can buy adapter m42 to m39.
All the best.
Zbigniew

 

[petersandford]

Thank you Zozur, I came across my old Praktica MTL 5B and popped it lens off and its bigger than my enlarger lens, so guess at some point the enlarger had been upgraded to use the M39 len