Imaging lens, optical apparatus equipped therewith, and method for manufacturing imaging lens

An imaging lens comprising, in order from an object side:

• a first lens group having positive refractive power;
• and
• a second lens group having positive refractive power,
• the first lens group consisting of a single lens component having positive refractive power and having a convex surface facing an image side,
• the second lens group consisting of, in order from the object side, a negative meniscus lens having a convex surface facing the object side, a positive lens having a convex surface facing the object side, an aperture stop, a cemented lens constructed by a negative lens having a concave surface facing the object side cemented with a positive lens having a convex surface facing the image side, and a positive lens, and
• at least a portion of the second lens group being moved along an optical axis, thereby carrying out focusing from an infinity object to a close object.

A method for manufacturing an imaging lens including, in order from an object side, a first lens group having positive refractive power and a second lens group having positive refractive power, the method comprising steps of:

• disposing the second lens group with consisting of a plurality of lens components;
• disposing the imaging lens with satisfying the following conditional expressions:
• 0.015<f/f1<0.085
• 0.80<f/f2<1.10
• where f denotes a focal length of the imaging lens, f1 denotes a focal length of the first lens group, and f2 denotes a focal length of the second lens group;
• and
• fixing a position of the first lens group with respect to the image plane.

A method for manufacturing an imaging lens including, in order from an object side, a first lens group having positive refractive power and a second lens group having positive refractive power, the method comprising steps of:

• disposing the first lens group consisting of a single positive lens component having a positive refractive power and having a convex surface facing an image side;
• disposing the second lens group consisting of, in order from the object side, a negative meniscus lens having a convex surface facing the object side, a positive lens having a convex surface facing the object side, an aperture stop, a cemented lens constructed by a negative lens having a concave surface facing the object side cemented with a positive lens having a convex surface facing the image side, and a positive lens;
• and
• moving at least a portion of the second lens group along an optical axis, thereby carrying out focusing from an infinity object to a close object.

An imaging lens comprising, in order from an object side:

• a first lens group having positive refractive power;
• and
• a second lens group having positive refractive power,
• a position of the first lens group being fixed with respect to an image plane,
• the second lens group consisting of a plurality of lens components, and
• the following conditional expressions being satisfied:
• 0.015<f/f1<0.085
• 1.55<TL/Σd<1.75
• where f denotes a focal length of the imaging lens, f1 denotes a focal length of the first lens group, TL denotes a total lens length of the imaging lens, and Σd denotes a distance along an optical axis between the most object side lens surface in the first lens group and the most image side lens surface in the second lens group.

An imaging lens comprising, in order from an object side:

• a first lens group having positive refractive power;
• and
• a second lens group having positive refractive power,
• a position of the first lens group being fixed with respect to an image plane,
• the second lens group consisting of a plurality of lens components, and
• the following conditional expressions being satisfied:
• 0.015<f/f1<0.085
• 4.00<TL/Ymax<5.00
• where f denotes a focal length of the imaging lens, and f1 denotes a focal length of the first lens group, TL denotes a total lens length of the imaging lens, and Ymax denotes the maximum image height of the imaging lens group.

A method for manufacturing an imaging lens including, in order from an object side, a first lens group having positive refractive power and a second lens group having positive refractive power, the method comprising steps of:

• disposing the second lens group with consisting of a plurality of lens components;
• disposing the imaging lens with satisfying the following conditional expressions:
• 0.015<f/f1<0.085
• 1.55<TL/Σd<1.75
• where f denotes a focal length of the imaging lens, f1 denotes a focal length of the first lens group, TL denotes a total lens length of the imaging lens, and Σd denotes a distance along an optical axis between the most object side lens surface in the first lens group and the most image side lens surface in the second lens group;
• and
• fixing a position of the first lens group with respect to the image plane.

A method for manufacturing an imaging lens including, in order from an object side, a first lens group having positive refractive power and a second lens group having positive refractive power, the method comprising steps of:

• disposing the second lens group with consisting of a plurality of lens components;
• disposing the imaging lens with satisfying the following conditional expressions:
• 0.015<f/f1<0.085
• 4.00<TL/Ymax<5.00
• where f denotes a focal length of the imaging lens, f1 denotes a focal length of the first lens group, TL denotes a total lens length of the imaging lens, and Ymax denotes the maximum image height of the imaging lens;
• and
• fixing a position of the first lens group with respect to the image plane.