Being 2 group zoom lenses where from 2 group zoom lenses and the interchangeable lens which possesses that and the electronic

摘要

PROBLEM TO BE SOLVED: To provide a compact zoom lens which is advantageous to secure aberration correcting performance and a variable power ratio while securing telecentric performance suitable to a digital single-lens reflex camera, to provide an interchangeable lens using the compact zoom lens, and to provide an electronic imaging apparatus using the compact zoom lens.;SOLUTION: The two-group zoom lens includes a negative first lens group G1, and a positive second lens group G2, at varying the power from a wide angle end to a telephoto end, a distance between the first lens group and the second lens group is reduced, and the first lens group and the second lens group are shifted so as to vary the power. The first lens group comprises a negative lens group G_1a and a positive lens group G_1b, the second lens group includes a positive lens L₂₁, a negative lens L₂₂ and a positive lens L₂₃, and also, a diaphragm S arranged in an air distance coming in contact with the positive lens L₂₁, and conditional expressions (A) and (B) related to the positive lens L₂₁ and the negative lens L₂₂ in terms of shape are satisfied.;COPYRIGHT: (C)2007,JPO&INPIT