Abstract: A lens unit, having a photographing lens, an aperture, and an aperture drive mechanism for opening and closing the aperture, comprising a memory that stores characteristics of the aperture drive mechanism, an aperture drive section that drives the aperture drive mechanism, and an aperture control section that controls the aperture drive section so that rate of change of light amount that passes through the aperture as a result of opening and closing operations of the aperture becomes constant, based on the characteristics of the aperture drive mechanism.

Abstract: A shooting apparatus comprising: a photographing optical system having a variable aperture diaphragm; an imaging section that outputs an image signal; a diaphragm position detection section that detects a diaphragm position; a lens control section that controls movement of a focus lens; a storage section that stores an amount of focal shift corresponding to the diaphragm position; a focus detection section that detects a peak of a contrast value based on the image signal, wherein the lens control section, while moving the focus lens to a focusing position based on a position at which the contrast value indicates the peak, corrects a position of the focus lens to be moved, on the basis of a diaphragm position when the position at which the contrast value indicates the peak is detected, a diaphragm position while moving the focus lens, and the amount of focal shift stored in the storage section.

Abstract: A lens unit, having a photographing lens, an aperture, and an aperture drive mechanism for opening and closing the aperture, comprising a memory that stores characteristics of the aperture drive mechanism, an aperture drive section that drives the aperture drive mechanism, and an aperture control section that controls the aperture drive section so that rate of change of light amount that passes through the aperture as a result of opening and closing operations of the aperture becomes constant, based on the characteristics of the aperture drive mechanism.

Abstract: A focusing device includes an imaging element, an imaging lens, a focus evaluation value detecting section, a control section. The imaging lens includes focus lens groups including first and second focus lens groups, and the imaging element to enable focus adjustment. The focus evaluation value detecting section detects a focus evaluation value based on an image signal acquired by the imaging element. The control section moves focus lens groups based on the focus evaluation value, effects a wobbling operation of the first focus lens group to focus on the subject, and moves the second focus lens group while effecting the wobbling operation of the first lens group for one period alone, so that image surface positions of the focus lens groups are moved by predetermined amounts.

Abstract: A shooting apparatus comprising: a photographing optical system having a variable aperture diaphragm; an imaging section that outputs an image signal; a diaphragm position detection section that detects a diaphragm position; a lens control section that controls movement of a focus lens; a storage section that stores an amount of focal shift corresponding to the diaphragm position; a focus detection section that detects a peak of a contrast value based on the image signal, wherein the lens control section, while moving the focus lens to a focusing position based on a position at which the contrast value indicates the peak, corrects a position of the focus lens to be moved, on the basis of a diaphragm position when the position at which the contrast value indicates the peak is detected, a diaphragm position while moving the focus lens, and the amount of focal shift stored in the storage section.

Abstract: An optical instrument comprises a ring member which is arranged to be rotatable with respect to a lens barrel, and also to slide in an optical axis direction, a movement mechanism for slide movement of the ring member to a first position or a second position in the optical axis direction, an encoder that generates signals in accordance with a rotation operation of the ring member, a slide position determination section for determining positional change accompanying slide movement to the first position or the second position by the movement mechanism, and a control section for performing determination of the signals from the encoder to switch the display operation, and prohibiting switching of the display operation when the slide position determination section has determined a positional change accompanying the slide operation.

Abstract: An optical instrument comprises a ring member which is arranged to be rotatable with respect to a lens barrel, and also to slide in an optical axis direction, a movement mechanism for slide movement of the ring member to a first position or a second position in the optical axis direction, an encoder that generates signals in accordance with a rotation operation of the ring member, a slide position determination section for determining positional change accompanying slide movement to the first position or the second position by the movement mechanism, and a control section for performing determination of the signals from the encoder to switch the display operation, and prohibiting switching of the display operation when the slide position determination section has determined a positional change accompanying the slide operation.

Abstract: A focusing device includes an imaging element, an imaging lens, a focus evaluation value detecting section, a control section. The imaging lens includes focus lens groups including first and second focus lens groups, and the imaging element to enable focus adjustment. The focus evaluation value detecting section detects a focus evaluation value based on an image signal acquired by the imaging element. The control section moves focus lens groups based on the focus evaluation value, effects a wobbling operation of the first focus lens group to focus on the subject, and moves the second focus lens group while effecting the wobbling operation of the first lens group for one period alone, so that image surface positions of the focus lens groups are moved by predetermined amounts.

Abstract: An optical instrument comprising a focusing lens provided inside a lens barrel, a ring member that is arranged to rotate with respect to a lens barrel, and to slide to a first position and a second position, a focusing mode setting section, provided on a camera body, for setting focusing mode, and a control section for, when the ring member has been slid to the first position, carrying out focusing in a focusing mode that was set in the focusing mode setting section, and when the ring member has been slid to the second position, stopping focusing the focusing mode that was set in the focusing mode setting section, and performing focusing of the focusing lens to a distance corresponding to an absolute position of the ring member.

Abstract: An optical instrument of the present invention comprises a ring member which is arranged to be rotatable with respect to a lens barrel, and also to slide in an optical axis direction, a movement mechanism for slide movement of the ring member to a first position or a second position in the optical axis direction, an encoder that generates signals in accordance with a rotation operation of the ring member, a slide position determination section for determining positional change accompanying slide movement to the first position or the second position by the movement mechanism, and a control section for performing determination of the signals from the encoder to switch the display operation, and prohibiting switching of the display operation when the slide position determination section has determined a positional change accompanying the slide operation.

Abstract: An optical device includes an optical system, a diaphragm unit, a diaphragm unit, a focus-lens driving unit, a diaphragm driving unit, and a diaphragm control unit. The diaphragm control unit controls the diaphragm driving unit in accordance with the position to which the focus lens group has been moved by the focus-lens driving unit, thereby controlling the aperture opening of the diaphragm unit and ultimately limit a light beam passing through the camera system.

Abstract: An optical device includes an optical system, a diaphragm unit, a diaphragm unit, a focus-lens driving unit, a diaphragm driving unit, and a diaphragm control unit. The diaphragm control unit controls the diaphragm driving unit in accordance with the position to which the focus lens group has been moved by the focus-lens driving unit, thereby controlling the aperture opening of the diaphragm unit and ultimately limit a light beam passing through the camera system.

Abstract: An optical instrument comprising a focusing lens provided inside a lens barrel, a ring member that is arranged to rotate with respect to a lens barrel, and to slide to a first position and a second position, a focusing mode setting section, provided on a camera body, for setting focusing mode, and a control section for, when the ring member has been slid to the first position, carrying out focusing in a focusing mode that was set in the focusing mode setting section, and when the ring member has been slid to the second position, stopping focusing the focusing mode that was set in the focusing mode setting section, and performing focusing of the focusing lens to a distance corresponding to an absolute position of the ring member.

Abstract: An optical instrument of the present invention comprises a ring member which is arranged to be rotatable with respect to a lens barrel, and also to slide in an optical axis direction, a movement mechanism for slide movement of the ring member to a first position or a second position in the optical axis direction, an encoder that generates signals in accordance with a rotation operation of the ring member, a slide position determination section for determining positional change accompanying slide movement to the first position or the second position by the movement mechanism, and a control section for performing determination of the signals from the encoder to switch the display operation, and prohibiting switching of the display operation when the slide position determination section has determined a positional change accompanying the slide operation.