, and Enlarging Raptars are awful. > > Richard Knoppow > dickburk@ix.netcom.com > Los Angeles, CA, USA What about Wollensak enlarging Velostigmats? I have a 3.5" f4.5 that looks like it's a 29mm thread. I always wondered about having a step-ring made for it so I could use it in a 39mm enlarger.