I am new to lasers and am trying to learn and find the forum full of imfo
I am in the process of buying a laser engraver from China and am down to 3 manufacturers as I see it, it will come down to after sale service
I donít understand what the lenses do am I right in thinking they can change the thickness of the beam ??
What lenses should I get with the engraver
Thanks in advance for your help