Imaging lens and imaging apparatus
AssigneeFUJIFILM Corporation
InventorHiroki SAITO
Life of this patent
Estimating the term…
Abstract
The imaging lens includes, successively in order from a position closest to an object side to an image side: a first lens group; and a second lens group that has a positive refractive power. During focusing, only the second lens group moves. A lens closest to the image side in the second lens group is a negative meniscus lens having a surface convex toward the object side. Assuming that a paraxial radius of curvature of an object side surface of the negative meniscus lens closest to the image side in the second lens group is rF, and a maximum image height is Y, the imaging lens satisfies Conditional Expression (1), which is represented by 0.5<rF/Y<3 (1).
Claims20
An imaging lens comprising, successively in order from a position closest to an object side to an image side:
- a first lens group;
- and a second lens group that has a positive refractive power,
- wherein during focusing, the first lens group remains stationary with respect to an image plane, and only the second lens group moves,
- a lens closest to the image side in the second lens group is a negative meniscus lens having a surface convex toward the object side, and
- assuming that
- a paraxial radius of curvature of an object side surface of the negative meniscus lens is rF, and
- a maximum image height is Y,
- Conditional Expression (1) is satisfied, which is represented by
- 0.5<rF/Y<3 (1).
Dependencies are inferred from the claim text.