JP2008145585A5 - - Google Patents

Claims (9)

An imaging apparatus including an imaging element that photoelectrically converts a subject image formed by a photographing optical system including a focus lens unit, and using a light beam emitted from the subject and passing through an optical system different from the photographing optical system, A focus measurement unit that outputs information related to the focus state of the subject, and a luminance measurement unit that outputs information related to the brightness of the subject using a light beam emitted from the subject and passed through an optical system different from the photographing optical system And a control unit for outputting information for driving the focus lens unit,
When the brightness of the subject according to the information output from the luminance measurement unit is brighter than a threshold, the control unit is based on the information output from the image sensor and the information output from the focus measurement unit. When the focus lens unit is driven and the brightness of the subject is darker than a threshold value according to the information output from the luminance measurement unit, the information is output from the imaging element without using the information output from the focus measurement unit. An imaging apparatus that drives the focus lens unit based on the output information. The imaging apparatus according to claim 1, wherein the threshold value is a value representing brightness of the subject based on information output from the imaging element. A warning unit that issues a warning when the brightness of the subject based on information output from the image sensor is brighter than the brightness of the subject based on information output from the luminance measurement unit. Item 3. The imaging device according to Item 2. 4. The imaging apparatus according to claim 3, wherein the warning unit emits a warning during non-photographing recording and warns by display without producing a sound during photographing recording. The imaging apparatus according to claim 1, wherein the focus measurement unit outputs information related to the distance of the subject. The control unit weights information obtained by the focus measurement unit with focal length information of the photographing optical system, and uses the weighted information to obtain information on the distance of the subject. The imaging apparatus according to claim 1, wherein: The imaging apparatus according to claim 6, wherein the control unit performs a focusing operation based on information from the imaging element after driving the focus lens unit based on information on the distance of the subject. . The imaging apparatus according to claim 1, wherein the threshold value is obtained based on one or more pieces of information among a zoom position, an F number, and a T number of the photographing optical system. The imaging apparatus according to claim 1, wherein the focus measurement unit and the luminance measurement unit are the same unit.