| 摘要 |
Provided is a photographic lens (ML) comprising a first lens group (G1) having a positive index of refraction, a second lens group (G2) having a negative index of refraction, and a third lens group (G3) having a positive index of refraction, and which is configured such that the second lens group (G2) moves along an optical axis when focusing from an object at infinity to an object at a finite distance. The first lens group (G1) is formed from a frontal group (G1a), and a rear group (G1b) which is separated from the frontal group (G1a) by the longest atmospheric gap within the first lens group (G1). The second lens group (G2) is configured to further comprise a negative lens (L21), and a bonded lens in which a positive lens (22) and a negative lens (23) are bonded in order from the object side. |
