| 摘要 |
PURPOSE:To facilitate extremely focus detection and to perform exposure control and control over a portraiture characteristic independently by cutting off the light of circumferential soft rings when a soft focusing lens having spherical aberration left intentionally is used. CONSTITUTION:The light transmission state of aperture rings D1-D6 are controlled by an arithmetic processing circuit 19 to perform normal aperture control. Then, circumferential soft rings S1-S3 are in a light shielding state, so a focus adjustment in a finder is not made difficult, and when a shutter is released, a shutter control circuit 25 places the soft rings in a light transmission state associatively, a photograph with soft effect is obtained. Further, the soft rings S1-S3 are placed in the light transmission state with a soft effect confirmation switch 26, so the effect is confirmed through the finder before the shutter is released. A soft effect selection switch 27 allows one lens to obtain easily a photograph with the soft effect and one without soft effect. Further, portraiture characteristics are varied by varying the height of incidence. |
