Material: flint glasses, UV-fused silica, Infrared fused silica, CaF2, Ge, ZnSe, Si, etc. Focal length:f+5mm-- f+1000mmf+1% (test by TIROPTICS OPTOMATIC2000 made in German) Length: 2mm-3mm f+0.1mm Width: 2mm-150mmf+0.1mm Tc tolerance:f+0.2mm Centration: 3-5' Surface accuracy: ¼-/2 Surface quality: 40/20 Clear aperture: 90% Coating: custom design. Standard lot.
