Zoom lens

Abstract

The invention relates to a wide-angle zoom lens adapted for use with a single-lens reflex camera incorporating an image pickup device for which an increased back focus is needed. The zoom lens comprises, in order from its object side, a lens group FG having negative refracting power and a lens group RG having positive refracting power, wherein zooming is carried out with a change in the space between at least two lens groups. The lens group FG having negative refracting power comprises, in order from its object side, a firs lens L1 that has negative refracting power and is in a meniscus form having a convex surface on its object side, a second lens L2 that is in a meniscus form having a convex surface on its object side, a third lens L3 that has negative refracting power and is in a meniscus form having convex on its object side, a fourth lens L4 that has negative refracting power and a concave surface on its object side, a fifth lens L5 of positive refracting power, and at least one negative lens located on an image plane side of the fifth lens L5.

Dependencies are inferred from the claim text.