Size:
How to pick size? (Please Read Before Purchasing)
Normally 80 watt and lower use the 18 mm lens (16.15 mm tube kit). 100 watt and higher use the 20 mm lens (25 mm tube kit). To be precise, you need to measure the bottom tube (diameter of the lens barrel) of your head assembly. That will determine what size kit you need.
If you have an AF2028-80, which has a 20 mm lens but uses a 16.15 mm tube, please choose the size “18 mm” for your machine.
For alignment
OMTech and American Photonics have partnered up to bring you the most comprehensive lens kit set for all your engraving needs. This 4 piece lens kit effectively eliminates the guesswork out of all your engraving and cutting needs. The AAA battery (included in kit) will act as your new focal tool; each lens and material focus distance is precisely the same thickness (10.5 mm) as the battery. The focal lens is suspended in the tube with adhesives intact for stress-free optical focusing. The lens kit makes cleaning your focal lens easy, as it allows you to clean your lens without ever having to remove or touch it. With a variety of focal length lenses, you'll be better equipped to either cut through thicker materials or engrave finer details within a project.