Double convex lenses having two spherical out ward curved surfaces, parallel to each other with positive focal length made from optical Extra white glass to use in Eye pieces, excellent for simple Eye pieces for different scientific application.more...
Simple Spherical Double Convex lenses having two out side curved parallel surfaces to each other and used for magnification and converging the light and having a positive focal length. Similarly Spherical Double Concave lenses having a negative focal length and two inwards parallmore...
Simple Spherical Double Convex lenses having two out side curved parallel surfaces to each other and used for magnification and converging the light and having a positive focal length. Similarly Spherical Double Concave lenses having a negative focal length and two inwards parallmore...