Patent ID: 9563043
Date: 2017-02-07
CPC Classifications: G02B

Claim:
1. A zoom lens comprising, in order from an object along an optical axis: a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having positive refractive power, and a fifth lens group, the fourth lens group being constituted by one positive lens, the fifth lens group being constituted by one lens fixed with respect to an image plane during zooming, and the following conditional expression being satisfied: where β2w denotes a magnification of the second lens group in a wide-angle end state, β3w denotes a magnification of the third lens group in the wide-angle end state, β2t denotes a magnification of the second lens group in a telephoto end state, and β3t denotes a magnification of the third lens group in the telephoto end state.