Imaging lens and imaging apparatus

摘要

An imaging lens substantially consists of negative first lens, positive second lens, negative third lens, positive fourth lens, positive fifth lens, and negative sixth lens in this order from an object side. At least one of second lens through sixth lens satisfies the following conditional expression (1), and the imaging lens, as a whole, satisfies the following conditional expression (2):
(1/τi)×(f/fi)<0  (1); andΣ(1/τi)×(f/fi)<0 (i=1 through 6)  (2).

主权项

1. An imaging lens substantially consisting of:
a first lens having negative refractive power; a second lens having positive refractive power; a third lens having negative refractive power; a fourth lens having positive refractive power; a fifth lens having positive refractive power; and a sixth lens having negative refractive power in this order from an object side, wherein at least one of the second lens through the sixth lens satisfies the following conditional expression (1), and the imaging lens, as a whole, satisfies the following conditional expression (2):
(1/τi)×(f/fi)<0  (1); andΣ(1/τi)×(f/fi)<0 (i=1 through 6)  (2), where τi: a thermal Abbe number of an i-th lens, f: a focal length of an entire system, and fi: a focal length of the i-th lens.