This Standa plano-concave lens, model number 14PCV5000-1-1, is a spherical lens with a base shape of a circle. It has a diameter of 25.4 mm and a thickness at the edge of 4 mm, while the center thickness is slightly less at 3.8 mm. The effective focal length (EFL) of this lens is -5000 mm, making it a powerful tool for focusing or diverging light.
The lens is made from n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low dispersion. The wavelength for this lens is 546 nm. It's important to note that this lens is uncoated, which means it may not perform optimally in environments with high levels of dust or humidity.
This lens is currently in stock and available for purchase on the Standa website. For more information, you can refer to the provided weblink.