| 摘要 |
A digital camera with reduced shutter lag and improved exposure accuracy, and including image pickup lens optics, an iris, an image pickup, a hold/gain control circuit, a luminance level detector, an exposure control circuit, and a control circuit. The exposure control circuit discriminates, based on a luminance level supplied from the luminance level detector, whether or not appropriate exposure is performed. Then, based on the discrimination result, the exposure control circuit arithmetically operates three values of numerical aperture of the iris, shutter speed of an electronic shutter of the image pickup, and gain of the hold/gain control circuit, which are necessary for appropriate exposure. The exposure control circuit arithmetically operates iris control data, electronic shutter control data, and gain control data necessary for the arithmetically operated exposure amounts to be individually reflected on the iris, the electronic shutter of the image pickup, and the hold/gain control circuit.
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