G_2 Collimation Glass Lens 405nm 445nm 515nm Laser Lens with Cap

Specification: It is for one G-2 Lens. It has an AR coating for 405nm - 520nm which is near ultra-violet up to the green spectrum and anywhere in between. This lens is great for close-up focusing for cutting and engraving. Specs: Size: M9*0.5. Fits standard 12mm modules and more. Naked Lens inside 6.33mm(Diameter) Transparency:>98% Front Focus: 4.02mm Back Focus: 4.8mmW Working Focus: 2.357mm (Normal Glass lens this data is around 7-8mm) Glass Type: L-BAL35 Structure: Single Element Coating: 405nm/445nm/515nm/520nm Anti-Reflective coating Package: 1pcs 405-G-2 with a cap