This is a Plano-Convex lens, type SLB-50.8-120PM, sourced from OptoSigma. It is designed for use within a wavelength range of 400-700nm, making it suitable for a wide range of optical applications. The lens has a diameter of 50.8mm and a focal length of 120mm, with a base shape of a circle.
The lens is made from n-bk7 schott material, a popular choice due to its excellent optical properties and versatility. The geometry of the lens includes a thickness at the edge of 2.8mm and a thickness at the center of 8.2mm. The front and back of the lens are coated with opt m, a coating that enhances the lens's performance and durability.
The lens's shape is spherical, and it has an effective focal length (EFL) of 120mm. The front radius (R1) is 62.28mm, and the back focal length (BFL) is 114.6mm. The lens does not have an inner radius or an outer radius.
According to the vendor, this lens is currently in stock and can be purchased directly from the OptoSigma website using the provided weblink. The link has been verified and is valid at the time of writing.