TRS127-020-A 12.7 mm Dia. N-SF8/N-BAF52 Unmounted Steinheil Achromatic Triplet; EFL=20mm 400-700nm

This is the TRS127-020-A, a 12.7 mm diameter Steinheil Achromatic Triplet lens, unmounted and sourced from Thorlabs. This lens is designed for use in the 400-700nm spectral range, making it suitable for a wide range of optical applications.

The lens is composed of three individual components, each made from N-SF8 and N-BAF52 Schott glass. This specific configuration is designed to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The achromatic design ensures that the lens focuses light accurately and efficiently across the entire spectral range.

The lens has a focal length of 20mm, as indicated by the EFL (Effective Focal Length) parameter. This, combined with its diameter, allows it to capture a substantial amount of light, making it suitable for use in high-resolution imaging systems or other applications where light gathering is crucial.

The lens is unmounted, meaning it does not come with any housing or attachment mechanism. This allows users to integrate it into their existing optical systems or design custom mounts to suit their specific needs.

The lens is coated with a proprietary coating, referred to as "tho trs127-020-a" in the item data. This coating is designed to enhance the lens's performance by reducing surface reflections and improving transmission.