This is a 14BCX300-2-1 Double-Convex Lens, sourced from the reputable vendor, Standa. The lens is characterized by its circular base shape and spherical geometry, with a diameter of 50.8 mm and a thickness that varies from 3 mm at the edge to 5 mm at the center. The effective focal length (EFL) of this lens is 300 mm, making it suitable for a variety of optical applications.
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 light scattering or where anti-reflective properties are required.
For more information about this lens, including its availability and related products, please refer to the provided weblink: http://www.standaphotonics.com/lenses/double-convex-lenses.php.