| 摘要 |
Provided is a zoom lens including a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group having negative refractive power, and a fourth lens group having positive refractive power. The first lens group contains a reflective optical element that bends the light path. In order from the object side, the second lens group comprises a positive 2p1 lens, a negative 2n lens, and a positive 2p2 lens. The third lens group comprises a single negative lens. Letting n2n be the index of refraction of the 2n lens, n2p2 be the index of refraction of the 2p2 lens,ν2p2 be the Abbe number of the 2p2 lens, andν2n be the Abbe number of the 2n lens, 0.30<n2n−n2p2<0.50 and 30<ν2p2−ν2n<60. |
