| 摘要 |
PROBLEM TO BE SOLVED: To provide a fixed focus system camera capable of easily focusing in accordance with a change in an object image magnification without using a conversion lens. SOLUTION: As for the fixed focus system camera, a photographic lens 11 is installed by introducing a fixed focus system. The photographic lens 11 has such a spherical aberration that a focal position by light incident on a surrounding part is further away from the object than the focal position by light incident on near an axis. The photographic lens 11 formed to such a shape is combined with a diaphragm 50 capable of adjusting the aperture diameter at three stages so as to have large, medium and small diameters. |
