This is a 40X plan-fluor objective lens for high-resolution biological and fluorescence applications. Semi-apochromatic optical corrections improve resolution and color accuracy by realigning blue, green, and red wavelengths. Plan field corrections further improve image quality by providing edge-to-edge sharpness. Along with improvements in resolution, the optics provide better transmittance in the ultraviolet and near-infrared bands for use in fluorescence microscopy.

The lens is designed for use with AmScope upright, infinity-corrected microscopes, as well as other microscopes using RMS mounts and 45mm parfocal distance. Due to the short working distance, the lens features a spring-loaded nosecone to prevent damage to the lens and specimen.