Cutting a hole in a lens board?

[Roger Thoms]

I should have double-checked that one, Roger. I've been retired for almost 3 yrs, and am a bit out of the loop now. It's a bit complicated because many of these companies buy certain things from one another, and also offer more than one line of quality. But what I really wanted to say is that an easy way to smooth the hole is with a simple sanding drum in the drill press.

My problem is I don’t trust any of these companies, it’s often hard to tell where thing actually come from. I do have some Whiteside bits and have been happy with them. Never used them on aluminum.

As far as cutting a hole in a aluminum lens board there’s always the lo-tech method of using a jewels saw and half round file or sanding drums on a drill motor. Bottom line is that there are many different ways to do it.

Roger