Title:
レンズ及び撮像システム
Document Type and Number:
Japanese Patent JP4444488
Kind Code:
B2
Abstract:
This invention discloses an optical apparatus including an image pickup optical unit, a light quantity adjustment unit inserted in the optical axis of the image pickup optical unit, the light quantity adjustment unit changing the aperture diameter to change the light quantity, and a controller for controlling a change of the aperture diameter by the light quantity adjustment unit. The controller changes the set value for the minimum aperture diameter of the aperture diameter of the light quantity adjustment unit in accordance with the form of the image pickup device of the image pickup apparatus on which the lens apparatus is mounted.
Inventors:
Naoya Kaneda
Application Number:
JP2000374075A
Publication Date:
March 31, 2010
Filing Date:
December 08, 2000
Export Citation:
Assignee:
Canon Inc
International Classes:
G03B7/095; H04N5/238; G02B7/02; G02B7/10; G03B9/02; G03B17/14; G03B17/18; G03B17/20; H04N5/225; H04N5/232
Domestic Patent References:
| JP11125860A | ||||
| JP11008803A | ||||
| JP3183273A | ||||
| JP11202398A | ||||
| JP2262629A |
Attorney, Agent or Firm:
Minoru Nakamura