| 摘要 |
Provided in the present invention is a fish-eye lens system which comprises, in order from an object side to an image side: a first lens group which has negative refractive power as a whole, and includes four lenses; and a second lens group which has positive refractive power as a whole, and includes at least three lenses. The provided fish-eye lens system also satisfies the following condition: 0.3<¦FL/FF¦<0.5, wherein, FF is the focus distance of the first lens group, and FL is the focus distance of the second lens group. |
