| 摘要 |
<p>PURPOSE: A fish-eye lens system and a photographing device including the same are provided to rapidly focus the fish-eye lens system and to compensate the curvature of the field of the whole object distance. CONSTITUTION: A fish-eye lens system includes a first lens group (G1) having a negative refractive force, an aperture, and a second lens group (G2) having a positive refractive force in sequence from a subject. The first lens group includes a 1-A lens group having a negative refractive force, a 1-B lens group having a negative refractive force, and a 1-C lens having at least one sheet of a positive lens in sequence from a subject. The 1-B lens group is moved and performs focusing.</p> |
