| 摘要 |
<p>[Problem] To enable the widening of the angle of view and a reduction in size of an imaging lens while enabling high optical performance. [Solution] An imaging lens is configured such that a first lens group (G1) having negative refractive power and a second lens group (G2) having positive refractive power are provided in order from the object side. The first lens group (G1) is formed from a first group first lens (L11) which is a single lens having negative refractive power; the second lens group (G2) is formed from a second group first lens (L21) having positive refractive power, a second group second lens (L22) having positive refractive power, and a second group third lens (L23) having negative refractive power, in order from the object. Furthermore, conditional expression (1): -1.1<f1/f<0 and conditional expression (2): f1/fg2<-0.7 are simultaneously satisfied, where f1 is the focal length of the first group first lens (L11), f is the focal length of the entire lens system, and fg2 is the combined focal length of the entire second lens group (G2).</p> |
