45-210 12.5 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=35mm MgF2 400-700nm

The 45-210 is a high-quality achromatic doublet lens from Edmund Optics, featuring a 12.5 mm diameter and a focal length of 35mm. This lens is designed for use in the 400-700nm spectral range, making it suitable for a wide range of applications.

The lens is constructed from two types of glass, N-SK11 and N-SF5, both from Schott. This combination helps to correct chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The result is a sharper, clearer image with reduced color fringing.

The lens features a standard MgF2 coating on both the front and back surfaces. This coating helps to reduce reflection, increasing the amount of light that passes through the lens and improving overall image quality. The coating is also designed to withstand the rigors of everyday use, ensuring long-lasting performance.

The geometry of the lens is carefully designed to provide optimal performance. The edge thickness is 3.98mm, while the center thickness is 3.68mm. The lens also features three radii of curvature (r1, r2, and r3) that help to shape the light as it passes through the lens. The inner and outer radii are 0mm, indicating a circular shape.

In terms of availability, the lens is currently in stock and can be purchased directly from the Edmund Optics website. The provided weblink provides direct access to the product page for easy purchasing.