I understand the difference between the various fiber laser F-Theta size lens (70x70, 110x110, 220x220, etc.) My question is about the thread/diameter of the lenses. Are they all the same size, so if I want to add a 70x70 and a 220x220 F-Theta to a chinese 30w fiber laser (currently has a 110x110), can I just pick up any one off ebay or cloudray or other source that has these two additional sizes I want?
Thanks. Rob