This is a high-quality double-concave lens, sourced from the reputable vendor Standa. The lens is designed with a base shape of a circle and features a spherical geometry. The lens has a diameter of 25.4 mm and a center thickness of 3.2 mm, with the edge being slightly thicker at 4 mm. The effective focal length (EFL) of this lens is 100 mm.
The lens is made from the material n-bk7 schott, which is a type of borosilicate glass known for its excellent optical properties. The lens is designed to work optimally with a wavelength of 546 nm.
The lens does not come with any coating, as indicated by the empty 'coating' field in the item data. This means that the lens will not have any additional protective or enhancing layers, and its performance should be considered in this context.
The lens is currently in stock and more information about it can be found on Standa's website. The link to the relevant page is provided in the item data.