Zoom lens and photographing device
AssigneeBeijing Xiaomi Mobile Software Co., Ltd.
InventorYasuhiko OBIKANE
Life of this patent
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Abstract
A zoom lens and a photographing device are provided. The zoom lens includes a first lens group with a negative refractive power and a second lens group with a positive refractive power in sequence from an object side. In a case of zooming from a wide-angle end to a telephoto end, the first lens group and the second lens group move by different trajectories to reduce an interval therebetween, and a following conditional expression is satisfied: 0.38≤OAL2/OALw≤0.80 where OAL2 is an axial length of the second lens group from the object side to an image side; and OALw is an axial length of the first lens group at the wide-angle end from the object side to an image plane.
Claims21
A zoom lens, comprising a first lens group with a negative refractive power and a second lens group with a positive refractive power in sequence from an object side, wherein in a case of zooming from a wide-angle end to a telephoto end, the first lens group and the second lens group move by different trajectories to reduce an interval therebetween, and a following conditional expression is satisfied:
- 0.38
- ≤
- OAL
-
- 2
- /
- OALw
- ≤
- 0.8
- ,
- _
- wherein
- OAL2:
- an axial length of the second lens group from the object side to an image side;
- and
- OALw:
- an axial length of the first lens group at the wide-angle end from the object side to an image plane.
A zoom lens, comprising a first lens group with a negative refractive power and a second lens group with a positive refractive power in sequence from an object side, wherein in a case of zooming from a wide-angle end to a telephoto end, the first lens group and the second lens group move by different trajectories to reduce an interval therebetween, and a following conditional expression is satisfied:
- -
- 5.
-
- 0
- ≤
- f
-
- 1
- /
- f
-
- 2
- ≤
- -
- 1.3
- ,
- _
- wherein
- f1:
- a focal length of the first lens group;
- and
- f2:
- a focal length of the second lens group.
A zoom lens, comprising a first lens group with a negative refractive power and a second lens group with a positive refractive power in sequence from an object side, wherein in a case of zooming from a wide-angle end to a telephoto end, the first lens group and the second lens group move by different trajectories to reduce an interval therebetween, and a following conditional expression is satisfied:
- 0.1
- ≤
- f
-
- 2
- /
- (
- f
-
- w
- ×
- f
-
- t
- )
- ≤
- 0.9
- ,
- _
- wherein
- f2:
- a focal length of the second lens group;
- fw:
- a focal length at the wide-angle end;
- and
- ft:
- a focal length at the telephoto end.
(canceled)
Dependencies are inferred from the claim text.