| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an imaging lens having good optical performances and focusing performances from a focusing state on an infinity object to a focusing state on a short distance object, optical equipment including an imaging lens, and a method for manufacturing an imaging lens.SOLUTION: The imaging lens includes, successively from an object side along the optical axis, a first lens group G1 having a positive refractive power and a second lens group G2 having a positive refractive power. The first lens group includes, successively from the object side, a first lens L11 having a negative refractive power and a second lens L12 having a negative refractive power. Focusing on from an infinity object to a short distance object is performed by moving at least a part of the second lens group along the optical axis while fixing the first lens group. The imaging lens satisfies conditions of 1.01<f2/f<2.20 and 3.00<f12/f11<50.00, where f represents a focal distance of the whole system in the imaging lens; f11 represents a focal distance of the first lens; f12 represents a focal distance of the second lens; and f2 represents a focal distance of the second lens group.</p> |
