This is a Plano-Concave Lens, type of Spherical Lens, offered by Standa, a renowned vendor in the optical industry. The lens is designed with a Base Shape of Circular and a Sub Type of Spherical Lens. The lens's geometry is defined by a diameter of 38.1 mm, a thickness edge of 5.7 mm, and a thickness center of 4.3 mm. The effective focal length (EFL) is -300 mm, indicating a diverging lens.
The lens is made from UVFS Mal- 1965, a material specifically designed for use in the optical industry. It is optimized for a wavelength of 355 nm. The lens's shape is spherical, and it does not come with any coating, as indicated by the empty 'coating' field in the item data.
The lens's status is 'Valid - in stock', according to the weblink status provided. For more detailed information, you can refer to the vendor's website through the provided weblink.