Wide-angle photographic lens

摘要

A small-size and high-performance wide-angle photographic lens system of the seven-group-seven-element type including first and second components of negative meniscus lenses with convex surfaces directed to the object, a third component of a positive lens having a large-curvature convex surface directed to the object, a fourth component of a positive lens having a large-curvature convex surface directed to the image, a fifth component of a biconcave negative lens, a sixth component of a positive meniscus lens having a convex surface directed to the image, and a seventh component of a positive lens.