AC254-400-A-ML 25.4 mm Dia. N-BK7/SF2 Mounted Achromatic Doublet; EFL=400mm 400-700nm

The AC254-400-A-ML is a high-quality mounted achromatic doublet lens, sourced from the renowned optical component manufacturer, Thorlabs. This lens is specifically designed for use in the 400-700nm spectral range, making it suitable for a wide range of applications in the visible spectrum.

The lens features a 25.4mm diameter and is constructed from two types of glass, N-BK7 and SF2, which are both renowned for their excellent optical properties. The use of these materials in a doublet configuration helps to correct chromatic aberrations, ensuring high-quality imaging across the specified spectral range.

The lens has a focal length of 400mm, as indicated by its EFL (Effective Focal Length) value. This, combined with its achromatic design, makes it an ideal choice for imaging applications that require a long focal length and high color correction.

The lens is coated with Thorlabs' AC400-700-A coating on both the front and back surfaces. This coating is designed to enhance the lens's transmission in the 400-700nm range, further improving its performance in visible light applications.

The lens is mounted, providing a convenient and ready-to-use solution for your optical system. The mount includes threading for easy integration with other optical components. According to Thorlabs' website, the item is currently in stock, ensuring quick delivery times.