This is a Plano-Concave Lens from Standa, a renowned vendor in the optical industry. The lens, which is part of the Spherical Lens category, is designed with a base shape of Circular and a Sub Type of Plano-Concave. The lens has a diameter of 12.7 mm and a thickness edge of 2 mm, while the thickness center measures 1.9 mm. The effective focal length (EFL) of the lens is -500 mm, indicating its diverging nature.
The lens's geometry includes an inner radius of 0 mm and an outer radius of 0 mm. The wavelength of the lens is 2940 nm, and it is made of CAF2 MAL-1963 material. The lens does not have any coating, as indicated in the item data.
For more information about this lens, including its availability and additional specifications, please refer to the vendor's website at http://www.standaphotonics.com/lenses/plano-concave-lenses.php. The link is valid and the lens is currently in stock.