I thought I might do this before leaving on this trip so I brought a printout of template and a few supplies. I scrounged up some glue and tape from the library here and went to work. The problem with a Bahtiov mask for small diameter lenses is that the pitch of the gratings needs to be rather small to pick up more of the diffracted orders. Cutting thin bars out with an x-acto knife was not my idea of fun. I'm not sure what I came up with was any easier but the end result was nicer.
I noticed that the bars were just about the width of a bobby pin. I brought along a pack and went to work bending and snipping with the leatherman tool. Then taping and more glue to put them in place. A couple long hair-shirt hours later ... here is the result.
|My bobby pin grating Bahtinov.|
"It's a smiley face".