Originally Posted by
Kev Williams
Now, according to their website, seems I don't want plano-convex:
"Plano-convex lenses, the most economical transmissive focusing elements available, are ideally suited for laser heat treating, welding, cutting, and infrared radiation collection where spot size or image quality is not critical."
--I'm kinda thinking for my needs, spot size and image quality IS critical! ;) Their description of meniscus's...
"Meniscus lenses are designed to minimize spherical aberration producing a minimum focal spot size for incoming collimated light."
Virtually all laser engraver lenses for sale on ebay are meniscus lenses-- and of all the plano convex lenses for sale on ebay, almost all were clear not yellow, and for totally different machines and/or purposes...
I did buy 3 ii-vi lenses off ebay yesterday, two 2"ers and a 2.5"er, so I'll be reporting back with results when they get here... :)