This lens will give a more “round” spot to the laser and a reduction in the overall laser spot size. It will be at the cost of a slight reduction in overall power, but the power density will be about the same as the high efficiency lens. This will give you very high precision in your photo engravings! Especially on the >3.8W lasers, the spot size is will shrink the long axis and expand the short axis to give a better burn pattern when engraving and cutting. Note that this lens requires more distance from the work surface than the normal High Efficiency lens that comes standard on our lasers.
Recommended Focus Height: 3″ to 6″ (26mm to 150mm)
Maximum Focus for best results: 6” (150mm).
Lens Holder Length: 12mm
Lens Holder Diameter: 9mm
For full details on lens comparisons see the blog post: