Quote Originally Posted by Jon Shiu View Post
I haven't done it, but in my research the following source showed up:
http://www.focalpointlens.com/fp_intro.html

Jon
Jon, that's what I was looking for, thanks. To the other responders,
a Triotar from an Art Deco Rolleicord is a 1930s-vintage lens -- it's
an uncoated lens. A lens hood doesn't do the trick. I'm thinking
that Focal Point may be able to resurface the lens. Or maybe I'll
luck out and find an old Rolleicord with a Triotar I can cannibalize
for the camera.

Sanders