Imaging lens and imaging apparatus
AssigneeFUJIFILM Corporation
InventorTaro Asami
Life of this patent
Estimating the term…
Abstract
Disclosed is an imaging lens substantially consisting of a first lens group having a positive refractive power and a second lens group having a positive refractive power, arranged in this order from the object side. Focusing is performed by moving the entire second lens group along the optical axis. The most-image-side lens of the first lens group, a lens which is second from a most-image side in the first lens group, and a lens which is third from the most-image side in the first lens group are all meniscus lenses with convex surfaces toward the image side. The imaging lens satisfies the formula: 1.0<FA/FB<8.0, where FA is the focal length of the first lens group, and FB is the focal length of the second lens group.
Claims20
An imaging lens substantially consisting of a first lens group having a positive refractive power and a second lens group having a positive refractive power in this order from an object side, wherein
- focusing is performed by moving an entirety of the second lens group along an optical axis;
- and
- a most-image-side lens of the first lens group, a lens which is second from a most-image side in the first lens group, and a lens which is third from the most-image side in the first lens group are all meniscus lenses with convex surfaces toward an image side, and
- the imaging lens satisfies conditional formula (2):
- 1.0<FA/FB<8.0 (2), where
- FA:
- a focal length of the first lens group, and
- FB:
- a focal length of the second lens group.
Dependencies are inferred from the claim text.