Round Double Concave Optical Glass Lens - 2" (50mm) Diameter - 250mm Focal Length - 4mm Thick Approx. - Eisco Labs
- This round double concave optical 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