This is a Plano-Convex Lens, type Lens, subtype Spherical Lens, base shape Circular, and geometry as follows: The diameter measures 38.1 mm, the thickness at the edge is 3.4 mm, and the thickness at the center is 4 mm. The effective focal length (EFL) is 500 mm, the radius of curvature (R1) is 258.35 mm, and the inner and outer radii are 0 mm.
The lens is made of n-BK7 Schott material, a common type of optical glass, and is designed for a wavelength of 546 nm. The lens does not have any coating, as indicated in the item data.
This lens is sourced from Standa, a reputable vendor in the field of optical components. According to the vendor's website, the lens is in stock, ensuring quick delivery upon order.