Reproduction lens having a six group six element composition a large vignetting factor and a compact size

摘要

A reproduction lens assembly including two groups of three elements for providing a large aperture efficiency and a compact size formed by arranging a lens system symmetrically with respect to a stop wherein the each group of three elements further comprise a first convex Meniscus lens having a concave surface thereof directed toward the stop, the stop being positioned on the front side of the first Meniscus lens, a second concave Meniscus lens having a concave surface thereof directed toward the stop and a third convex Meniscus lens having a concave surface thereof directed toward the stop with a small air gap the third and second Meniscus lens.