The 49-279 is a high-quality achromatic doublet lens, sourced from the renowned optical components vendor, Edmund Optics. This lens boasts a 40 mm diameter and is designed for use within the visible light spectrum, specifically between 425-675 nm. The lens is part of Edmund Optics' extensive catalog and is currently in stock, as indicated by its weblink status.
The lens is a multiplet, meaning it is composed of multiple optical elements. The geometry of the lens is carefully designed, with an effective focal length (EFL) of 250 mm, a thickness edge of 10.57 mm, and a center thickness of 8 mm. The lens also features an inner radius of 0 and an outer radius of 0, contributing to its compact design.
The lens is constructed from two types of high-grade optical glass: N-BK7 and N-SF5, both from Schott. These materials are known for their excellent optical properties, making them ideal for use in a wide range of applications. The lens is coated with Edmund Optics' standard VIS-0 coating on both the front and back surfaces, which enhances its light transmission capabilities within the specified visible light spectrum.