Zoom lens and imaging apparatus
AssigneeSony Corporation
InventorMasaharu Hosoi
Life of this patent
Estimating the term…
Abstract
There is provided a zoom lens including a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group having negative refractive power, and a fourth lens group having positive refractive power, the lens groups being arranged in order from an object side to an image side. The second lens group includes a front group having positive refractive power, and a rear group having positive refractive power, the front and rear groups being arranged in order from the object side to the image side. The front group includes a positive lens, a positive lens, a negative lens, and a positive lens, the lenses being arranged in order from the object side to the image side. The rear group includes at least one positive lens.
Claims11
A zoom lens comprising:
- a first lens group having negative refractive power;
- a second lens group having positive refractive power;
- a third lens group having negative refractive power;
- and
- a fourth lens group having positive refractive power, the lens groups being arranged in order from an object side to an image side,
- wherein the second lens group includes
- a front group having positive refractive power, and
- a rear group having positive refractive power, the front and rear groups being arranged in order from the object side to the image side,
- wherein the front group includes
- a positive lens,
- a positive lens,
- a negative lens, and
- a positive lens, the lenses being arranged in order from the object side to the image side, and
- wherein the rear group includes
- at least one positive lens.
An imaging apparatus comprising:
- a zoom lens;
- and
- an image sensor configured to convert an optical image formed by the zoom lens into an electrical signal,
- wherein the zoom lens include
- a first lens group having negative refractive power,
- a second lens group having positive refractive power,
- a third lens group having negative refractive power, and
- a fourth lens group having positive refractive power, the lens groups being arranged in order from an object side to an image side,
- wherein the second lens group include
- a front group having positive refractive power, and
- a rear group having positive refractive power, the front and rear groups being arranged in order from the object side to the image side,
- wherein the front group includes
- a positive lens, a positive lens,
- a negative lens, and
- a positive lens, the lenses being arranged in order from the object side to the image side, and
- wherein the rear group includes
- at least one positive lens.
Dependencies are inferred from the claim text.