Patent Number: 7,715,114

Title: Zoom lens and pickup apparatus

Abstract: Disclosed herein is a zoom lens, including: a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a positive refracting power; and a fourth lens group having a positive refracting power; the first, second, third and fourth lens groups being disposed in order from the object side; the first lens group including only a cemented lens including a positive lens and a negative lens cemented in order from the object side and having a generally positive refracting power; the first lens group being configured so as to satisfy the conditional expression (25<.nu..sub.d11-.nu..sub.d12<50) where .nu..sub.d11 is the Abbe number of the positive lens of the first lens group and .nu..sub.d12 is the Abbe number of the negative lens of the first lens group.

Inventors: Yamano; Hiroki (Tokyo, JP)

Assignee: Sony Corporation

International Classification: G02B 15/14 (20060101)

Expiration Date: 5/11/12018