This is a Plano-Convex Lens, type Lens, subtype Spherical Lens, base shape Circular, manufactured by Standa. The lens has a diameter of 50.8 mm and a thickness at the edge of 4.1 mm, while the thickness at the center is 5 mm. The effective focal length (EFL) is 700 mm, and the radius of curvature (R1) is 361.69 mm. The lens is made of n-bk7 schott material and is designed for a wavelength of 546 nm. The lens does not have any coating.
The lens is a Plano-Convex type, meaning one side is flat while the other side is curved. This design is often used to focus or collimate light in various optical systems. The lens is uncoated, which means it does not have any additional layers to enhance its performance or protect it from environmental factors. This might make the lens more susceptible to damage or degradation over time, but it can also make it more cost-effective.
The vendor, Standa, is a well-known manufacturer of optical components, and the lens is currently in stock on their website. The provided weblink leads directly to the product page, where more information and specifications can be found.