IMAGING DEVICE, IMAGING DEVICE BODY, AND LENS BARREL

摘要

There is provided an imaging device that includes an APD filter, and can accurately perform the determination of an imaging exposure and the detection of a focus position together.;An imaging exposure is determined using a corrected diaphragm value (T number) obtained by correcting a diaphragm value on the basis of optical characteristics of the APD filter and an imaging diaphragm, which is determined during the determination of the imaging exposure, is set. After that, a search interval SD, by which a focus lens is moved for the time of auto-focusing, is determined using a diaphragm value (F number), which is not yet corrected, without using the corrected diaphragm value (T number). The search interval SD is set to a value that is calculated by dividing the product of the depth D of focus and a predetermined value C by an image plane movement coefficient k.

主权项

1. An imaging device comprising:
a focus lens; an imaging element that photoelectrically converts an incident ray entering through the focus lens and outputs an imaging signal; a diaphragm that changes the amount of the incident ray; a photometric unit that performs photometry on the basis of the imaging signal; an apodization filter that is disposed on a light path of the incident ray; an imaging exposure determining unit that determines an imaging exposure on the basis of a photometric value obtained from the photometric unit and determines the imaging exposure by using a corrected diaphragm value which is obtained by correcting a diaphragm value on the basis of optical characteristics of the apodization filter; a focus position detecting unit that moves the focus lens by search intervals and detects a focus position by calculating a focusing evaluation value for each search interval on the basis of the imaging signal; and a search interval determining unit that determines the search interval on the basis of a depth of focus depending on the diaphragm value, and determines the search interval by using a diaphragm value, which is not yet corrected.