This is a Plano-Convex Lens, a type of spherical lens, sourced from Standa. The lens has a base shape of a circle and is uncoated. The lens's diameter measures 25.4 mm, and it has a thickness of 2.3 mm at the edge and 6 mm at the center. The effective focal length (EFL) of the lens is 50 mm.
The lens's inner radius is 0, and the outer radius is also 0, indicating a plano-convex geometry. The radius of curvature (R1) is 23.804 mm. The lens is made of UVFS Mal- 1965 material and is designed to work with a wavelength of 355 nm.
The item data indicates that this lens is in stock and available for purchase. For more information, you can refer to the vendor's website through the provided weblink.