This is a Plano-Convex lens with a diameter of 50.8 mm, sourced from Alkor Technologies. The lens is made of BaF2, a material with a refractive index that varies with wavelength, making it suitable for a wide range of applications. The lens has an effective focal length (EFL) of 150mm, making it a medium to long-range lens.
The lens geometry includes a thickness of 2.5mm at the edge and 7.4mm at the center. The curvature of the lens is defined by a radius of 67.57mm on the curved side. The lens is uncoated, which means it does not have any additional layers to enhance light transmission or reduce reflection.
This lens is available for purchase from Alkor Technologies, as indicated by the "weblink status" field in the item data. For more information, you can visit the vendor's website through the provided weblink.