Hi everybody,

I am really curious about actual usage of barrel lenses.

How do you attach one such lens to the leansboard? I have seen that some of them have a number of holes around the perimeter of the lens clearly for screws to attach the lens to a (wooden...) board. That's it? Make sure the hole is big enough and just screw the lens on the board? What about big big lenses? No problem in having the screws loosening up after a while? What about other methods to connect a barrel lens to the board, e.g., do some come with a retaining ring?

Another question is how many of you are in fact using barrel lenses and how you manually "shutter" them. The hat trick?

Thanks!!!!