Imaging lens and imaging apparatus equipped with the imaging lens
AssigneeFUJIFILM Corporation
InventorsYoshikazu Shinohara, Michio Cho, Sumihiro Nishihata
Life of this patent
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Abstract
An imaging lens substantially includes six lenses, constituted by: a first lens having a positive refractive power and a convex surface that faces an object side; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power and a concave surface that faces the object side; and an aspherical sixth lens having a negative refractive power, the surface of which is concave toward an image side in the vicinity of an optical axis and convex toward the image side at the peripheral portion thereof. The imaging lens satisfies a predetermined conditional formula.
Claims18
An imaging lens substantially consisting of six lenses, including;
- a first lens having a positive refractive power and a convex surface that faces an object side;
- a second lens having a negative refractive power, which is a meniscus lens having a convex surface toward the object side;
- a third lens having a positive refractive power;
- a fourth lens having a positive refractive power;
- a fifth lens having a negative refractive power and a concave surface that faces the object side;
- and
- a sixth lens having a negative refractive power, which is of an aspherical shape having a surface which is concave toward an image side in the vicinity of an optical axis and convex toward the image side at the peripheral portion thereof;
- in this order from the object side;
- and satisfying the following conditional formula:
- −4.0<f/f6<−0.8 (1)
- wherein f is the focal length of the entire system, and f6 is the focal length of the sixth lens.
Dependencies are inferred from the claim text.