Loading patent…
OwnerKyoya TOKUNAGA, Hiroki HARADA +1inventors
InventorsKyoya TOKUNAGA, Hiroki HARADA, Satoshi YAMAGUCHI
Estimating the term…
An optical system that achieves size reduction in a zoom lens with high magnification and has favorable optical performance, an optical apparatus, and a method for manufacturing the optical system are provided. An optical system OL included in an optical apparatus such as a camera 1 includes, sequentially from an object side, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a middle group GM constituted by one or two lens groups and having positive refractive power, a focusing group GF that is a lens group having negative refractive power and moves in an optical axis direction at focusing, and a rear group GR constituted by at least one lens group, distance between lens groups adjacent to each other changes at magnification change from a wide-angle end state to a telephoto end state, and the optical system OL satisfies a predetermined condition.
An optical system comprising, in order from an object side:
An optical system comprising, in order from an object side:
(canceled)
A method for manufacturing an optical system including, in order from an object side, first lens group having positive refractive power, a second lens group having negative refractive power, a middle group constituted by one or two lens groups and having positive refractive power, a focusing group that is a lens group having negative refractive power and moves in an optical axis direction at focusing, and a rear group constituted by at least one lens group, the method comprising:
Dependencies are inferred from the claim text.