This is the G052115000 12.7 mm Dia. N-BK7 Mounted Plano-Convex Lens, a high-quality optical component sourced from Qioptiq Photonics. The lens, which has a focal length (EFL) of 150mm, is designed for use in a variety of optical systems and applications.
The lens is spherical in shape, with a base shape of circular. It has a diameter of 12.7 mm and a thickness at the edge of 2.7 mm. The thickness at the center of the lens is slightly greater, at 3 mm. The lens is made from N-BK7 glass, a popular material for optical components due to its excellent optical properties.
The lens is uncoated, meaning it does not have any additional layers applied to its surface to alter its optical properties. This can make it more susceptible to environmental factors such as dust and moisture, but it also means that it does not introduce any additional chromatic aberration or other optical distortions.
The lens is mounted, which means it is ready for immediate use in an optical system. This can save time and effort in the assembly process. The web link provided leads to the product page on Qioptiq's website, where you can find more information and purchase this lens. According to the website, the lens is currently in stock.