SPANCARE PHARMACEUTICALS Double Convex and Concave Lens,Concave and Convex of Dia 50mm, F.L.10cm and 20cm

Double Convex and Concave Lens SET OF 8 Concave and convex of Dia 50mm, F.L.10cm and 20cm Spherical, optically worked glass, with ground edges, highly polished PRODUCT DESCRIPTIONSDouble Convex and Concave Lens1. Concave and convex of Dia 50mm, F.L.10cm and 20cm 2. Spherical, optically worked glass, with ground edges, highly polished3.Convex is used in the camera, focus sunlight, overhead projector, projector microscope, simple telescope, magnifying glasses, etc. It is also used for the correction of the problem in long sight.4.Concave is used in glasses, some telescopes, spy holes in the doors, etc. It is also used for the correction of the problem in short sight A concave lens is thinner in the middle and thicker at the edges, and is also known as Diverging Lens A convex lens is thicker in the middle and thinner at the edges, and is also known as Converging Lens