OMTech 18mm ZnSe Focus Lens, CO2 Laser Engraver Focal Lens with 2.5 Inch Focal Length, 2.5" FL Zinc Selenium Replacement Lens for 50W 60W 70W 80W Laser Engraving Machines, 99.5+ Transmittance

Engrave better and faster with OMTech's ultra-high transmittance focus lens! Manufactured from high-quality physical vapor deposition zinc selenium, our new generation of CO2 laser focus lenses offers peak optical performance. Strongly antireflective coatings on both sides give our industry-leading lenses a light transmittance rate better than 99.5% for infrared laser light at the critical wavelength of 10.6 microns. To ensure the longest service life, the coating on both sides of the lens also helps it resist scratches and other damage. The unique positive meniscus shape of our lens keeps things easy as you install it into your laser engraving machine. With OMTech's brand-new focus lens, your laser engraving, cutting, etching, and marking work has never been easier! Specifications Material: Zinc Selenium Color: Yellow Diameter: 18 mm (0.71 in.) Thickness: 2 mm (0.08 in.) Focal Length: 2.5 in. (63.5 mm) Rec. Wavelength: 10.6 microns (10600 nm) Min. Light Transmittance: 99.5% Net Weight: 0.2 oz. (5 g) Package List 1 x CVD ZnSe Focus Lens

• High-Quality CVD ZnSe: OMTech's powerful focus lenses are manufactured from premium zinc selenium via chemical vapor deposition for superior optical properties
• High Transmittance: Both sides of each lens are coated with strongly antireflective coatings to achieve a better than 99.5% transmittance rate for infrared light at a wavelength of 10.6 microns
• Lasting Durability: Our laser engraver focus lenses' double-sided coating process also ensures outstanding scratch resistance for a long service life
• Wide Compatibility: This 18mm laser focus lens can be used in your 50W-80W CO2 laser engraving and cutting machine for more accurate and efficient production
• Easy to Use: The meniscus shape of OMTech's engraver focal lens lets you install it easily and correctly onto your machine in the proper orientation; detailed cleaning instructions also help you take the best care of your lens