50mm Diameter Double Convex Spherical Lenses - Rapid PH30067/9, Double-convex spherical lens with a focal length of 1000mm. Rapid Double Convex Spherical - Diameter 50mm - Fl 1000mm
50mm Diameter Double Concave Spherical Lenses - Rapid PH30078/9, A double-concave spherical lens with a focal length of 1000mm and a power of +1D. Rapid Double Concave Spherical Lens - Diameter 50mm - Fl 1000mm
50mm Diameter Double Convex Spherical Lenses - Rapid PH30067/1, Double-convex spherical lens with a focal length of 50mm. Rapid Double Convex Spherical - Diameter 50mm - Fl 50mm