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Specifications:
• Material: China PVD ZnSe (max 80 W)
• Wavelength: 10.6 um
• Diameter: 18/19.05/20 mm
• Diameter tolerance: +0/-0.1 mm
• Focal length: 1.5/2/2.5/3/4/5 inches
• Focal length tolerance: ± 2%
• Transmittance: 99.5%
• Clear aperture (polished) > 90%
• AR coating reflectivity < 0.3%
• Scratch-dig: 20 - 10
There are currently no optional accessories for this item.