Patent ID: 11886040
Assignee: FUJIFILM CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. An imaging lens comprising:
only eight lenses consisting of, in order from an object side to an image side,
a first lens that has a negative refractive power,
a second lens that has a negative refractive power,
a third lens that has a positive refractive power and of which an image side surface is convex,
a fourth lens that has a positive refractive power and of which an object side surface is convex,
a fifth lens that has a negative refractive power,
a sixth lens that has a positive refractive power and of which an image side surface is convex,
a seventh lens that has a positive refractive power and of which an object side surface is convex, and
an eighth lens that has a negative refractive power, as lenses having refractive powers,
wherein in the sixth lens, an absolute value of a radius of curvature of the image side surface is smaller than an absolute value of a radius of curvature of an object side surface, and
wherein assuming that a distance on an optical axis between the second lens and the third lens is Db23 and a focal length of the imaging lens is f, Conditional Expression (2) is satisfied, which is represented by

0.8<Db23/f<7  (2).