| 摘要 |
A wide-angle lens WL including, in order from an object: a first lens L1 which is a negative meniscus lens having a convex surface facing the object; a second lens L2 which is a positive lens; a third lens L3 which is a negative lens; a fourth lens L4 which is a positive lens; and a fifth lens L5 which is a positive lens, wherein the condition of 0.2<d8/f<0.64 is satisfied, where d8 denotes an air distance between the fourth lens L4 and the fifth lens L5, on an optical axis, upon focusing on an object point at infinity, and f denotes a focal length of the wide-angle lens WL upon focusing on an object point at infinity.
|
