The PCX-FS-006-050 from Artifex Engineering GmbH & Co. KG is a Optical Lens with Wavelength Range 587.6 nm n=1.45848, Focal Length 48.667 to 50 mm, Center Thickness 1.94 mm, Diameter 6.3 mm, Radius 22.923 mm. More details for PCX-FS-006-050 can be seen below.