Patent ID: 8169535
Filing Date: 2012-05-01
Classification: G03B,H04N

Abstract:
1. An interchangeable lens mountable to a camera body, comprising: an optical system operable to collect light from a subject to form a subject image; a diaphragm operable to adjust an amount of light of the subject image to be collected by the optical system; a driving unit operable to drive the diaphragm based upon an aperture value within a predetermined range; a storage unit operable to store speed information relating to a speed at which the driving unit can be set to drive the diaphragm, the speed information being provided for each of a plurality of aperture value ranges which are obtained by dividing the predetermined range of the aperture value, the speed information relating to the speed indicating a settable rate of change in the light amount which changes as the driving unit drives the diaphragm; and a transmitting unit operable to transmit the speed information stored in the storage unit to the camera body.