Round Double Concave High Optical Purity Glass Lens - 2" (50mm) Diameter - 250mm Focal Length - 4mm Thick Approx. - Eisco Labs

• This round double concave high optical purity glass lens is designed for physics and educational uses.
• It is approximately 2" (50mm) diameter and 4mm thick. Note, thickness varies as they are not designed to be consistent in that respect.
• Because of their educational use design, there may be minor imperfections that do not affect physical function.
• 250mm Focal Length

Round double concave high optical purity glass lens designed for physics and educational uses.