This is a 14BCV50-05-1 Double-Concave Lens, sourced from the reputable vendor, Standa. The lens is a Spherical Lens (Concave-Concave) type, with a base shape of Circular. It boasts a diameter of 12.7 mm and a center thickness of 2.6 mm, with an edge thickness of 3 mm. The effective focal length (EFL) of this lens is -50 mm, indicating its concave nature.
The lens is made from n-bk7 schott material, which is a popular choice for its high refractive index and low dispersion. The wavelength of this lens is 546 nm, which is in the visible light spectrum.
Please note that this lens does not come with any coating, as indicated in the item data. Coatings are often applied to lenses to enhance their performance, such as reducing reflection, increasing transmission, or protecting the lens surface. If you require a coated lens, please consider this factor when making your selection.
The item data also indicates that this lens is in stock and available for immediate purchase. For more information, you can refer to the vendor's website, which is provided in the item data.