CPC G02B 15/163 (2013.01) [G02B 13/009 (2013.01); G02B 13/02 (2013.01)] | 14 Claims |
1. A zoom lens comprising, in order from an object side to an image side:
a first lens unit having a positive refractive power; and
a subsequent unit including a plurality of lens units,
wherein the first lens unit is configured not to move for zooming,
wherein a distance between each pair of adjacent lens units changes in zooming,
wherein the subsequent unit includes, in order from the image side to the object side,
a lens unit having a positive refractive power and configured not to move for zooming,
a moving positive lens unit consisting of one or two lenses, having a positive refractive power, and configured to move in zooming, and
a diaphragm configured to move in zooming,
wherein the diaphragm is closer to the object side at the wide-angle end than at the telephoto end, and
wherein the following condition is satisfied:
0.01≤Lwt/Td≤0.25
where Lwt is a distance on an optical axis between a position of the diaphragm at the wide-angle end and a position of the diaphragm at the telephoto end, and Td is a distance on the optical axis from a surface closest to the object side of the zoom lens to an image plane of the zoom lens at the wide-angle end.
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