if i figured out how to mount this to a laser do you think it would work as a beam expander i found this in the attic bout 20 min ago
http://www99.shopping.com/xPF-Canon-Wide-Angle-Telephoto-35-70mm-f-3-5-4-5-FD-Manual-Focus-Lens
http://www99.shopping.com/xPF-Canon-Wide-Angle-Telephoto-35-70mm-f-3-5-4-5-FD-Manual-Focus-Lens