What do you intend to lase?
I’ve ended up with 4 lenses… The shorter the lens the smaller the depth of field and smaller dot size. Whereas a longer lens will have a greater depth of field and larger dot size.
The lens that will cover your work is the best. I bought mine for 300mmX300mm, it’s an F420, I think… I use the F160 for 6"X6" tile and the F100 for 70mmX70mm coverage…
A longer lens with purchase will ship a taller column… it’s not easy to extend them but it’s easy to lower a short lens down on a tall column…
Left is a 6"x6" porcelain tile using LBT100 coating. The rest are plain annealing, middle is a stainless steel knife and then stainless dog tags… The color looking annealing usually requires a MOPA type machine… Dog tag done with materials test in Lightburn… I’m only varying the speed and interval…
Check out this video…
Good luck
