Large PCX Condensers offer commercial quality at an excellent price. These large size (4” to 8” diameter) condenser lenses are suitable for use in projectors, spotlight, enlargers, solar condensing and other light concentration duties. These lenses are ground, not cast, using optical BK7 glass. This permits them to be used for magnification or low-resolution imaging duties where a large lens is required. Combine 2 or more lenses to produce systems with shorter focal lengths.