Recent content by dylanetaft

A few of them show up as 8 - 8.3mm focal length. I see sites like Edmund Optics have experimental grade lenses. When I get it in, it might be worth experimenting with a bit.

So, I think the "focusing" lens is a aspherical collimating lens. I'm reading about g2, g7, 3 lens, seems like marketing gibberish from Sanwu? If it really was a good collimating lens, the focus wouldn't be drastically affected if the work piece moves closer or further away from the lens...

On sites like banggood, there are cheap laser engravers. I ordered one. Anyone know the optics of the inside? Usually they have an adjustable focus ring. Would I be correct in that there is a light collimating lens on the inside, and the little lens on the end that you twist is some sort of...