Patent application number | Description | Published |
20090268082 | CAMERA BODY, INTERCHANGEABLE LENS, AND IMAGING APPARATUS - There are provided a camera body capable of operating a drive unit of an interchangeable lens at a low drive sound level, an interchangeable lens, and an imaging apparatus including such a camera body and an interchangeable lens. The camera body to which an interchangeable lens is mountable, the interchangeable lens including an optical member operable to change an optical condition and a drive unit operable to drive the optical member at a drive speed within a predetermined range, the camera body have: a receiving unit operable to receive silent speed information from the interchangeable lens, the silent speed information indicating a setting value related to a silent operation of the drive unit, the setting value being a value of a drive speed within the predetermined range; and a control unit operable to generate a control signal for driving the drive unit based on the received silent speed information, when attempting to drive the drive unit of the interchangeable lens with a suppressed drive sound of the interchangeable lens, and send the generated control signal to the interchangeable lens. | 10-29-2009 |
20090284612 | INTERCHANGEABLE LENS, CAMERA BODY AND CAMERA SYSTEM - An interchangeable lens mountable to a camera body includes 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, and a transmitting unit operable to transmit the speed information stored in the storage unit to the camera body. The speed information is provided for each of a plurality of aperture value ranges which are obtained by dividing the predetermined range of the aperture value, and relates to the speed indicating a settable rate of change in the light amount which changes as the driving unit drives the diaphragm. | 11-19-2009 |
20090284643 | IMAGING APPARATUS AND CAMERA SYSTEM - An imaging apparatus includes an optical system including a focus lens, a driver configured to drive the focus lens, a controller configured to control a supply of power to the driver, and a setting unit configured to set a power supply mode for specifying a method of supplying power to the driver. When a predetermined power supply mode is set, the controller determines according to a magnitude of a depth of field of the optical system during whether holding power for holding the state of the focus lens is supplied to the driver when the focus lens is stopped, and controls the supply of the holding power to the driver according to the result of the determination. | 11-19-2009 |
20100066864 | LENS BARREL AND IMAGING APPARATUS - A lens barrel includes a correction lens to move along an optical axis to perform zoom tracking, a correction lens driver to drive the correction lens, a zoom lens, a zoom ring to be turned by a user, a zoom lens driver to mechanically move the zoom lens according to an amount of turn of the zoom ring, a position detector to detect a position of the zoom lens, a rate detector to detect a change rate of the position of the zoom lens, a storage unit to store relational information which associates the position of the zoom lens with a focus position of the correction lens, and a controller to control the correction lens driver. The controller determines a focus position of the correction lens corresponding to a position more distant by a predetermined amount from the position of the zoom lens detected by the position detector, by referring to the relational information, and controls the correction lens driver to drive the correction lens with a target position set to the determined focus position. The predetermined amount is changed according to the change rate of the position of the zoom lens detected by the rate detector. | 03-18-2010 |
20100194966 | INTERCHANGEABLE LENS CAMERA SYSTEM HAVING AUTOFOCUSING FUNCTION - To provide an interchangeable lens camera system for shooting with the best in-focus position, no matter how a group of two or more interchangeable lenses to produce different degrees of spherical aberrations and a group of cameras of different types with different evaluated autofocus frequencies are combined. The camera system of this invention includes a lens unit and a camera body to be removable and attachable from/to each other. The lens unit includes a first computing section for acquiring shooting parameters during a focusing operation and a storage section that stores reference data for changing focus positions according to the contrast of image. The camera body includes an imaging device to output a video signal representing subject's image and a second computing section for measuring the contrast of the image based on its own predetermined evaluated AF frequency during the focusing operation and calculating a correction value based on the shooting parameter and the reference data associated with the highest contrast, thereby changing the focus positions according to the correction value calculated. | 08-05-2010 |
20100232775 | Interchangeable lens, camera body, and camera system - An interchangeable lens has a zoom lens, a zoom driver operable to drive the zoom lens along an optical axis, a focus lens, a focus driver operable to drive the focus lens along the optical axis, and a storage unit operable to store link information which links position information indicating a position of the zoom lens on the optical axis with information about a variation in magnification caused by the focus lens advancing and retreating on the optical axis with the zoom lens located at the position indicated by the position information. | 09-16-2010 |
20100315537 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens includes a focus cam for converting a first rotation amount given upon a focus operation into a movement of the focus lens group and further converting a second rotation amount given upon a zoom operation into the movement of the focus lens group, and a focus cam follower engaged with the focus cam and operable to move in the focus cam. The focus cum follower rotates in the focus cum according to the rotation amount of the zoom driving unit to move the focus lens group. A lift amount of the focus cam is defined so that a rotation amount of the focus driving unit from a far end position to an infinite position when the rotation position of the zoom driving unit is at a wide-angle end becomes larger than the rotation amount when the rotating position of the zoom driving unit is at a telephoto end. | 12-16-2010 |
20120070139 | IMAGING APPARATUS AND CAMERA SYSTEM - An imaging apparatus includes an optical system including a focus lens, a driver configured to drive the focus lens, a controller configured to control a supply of power to the driver, and a setting unit configured to set a power supply mode for specifying a method of supplying power to the driver. When a predetermined power supply mode is set, the controller determines according to a magnitude of a depth of field of the optical system during whether holding power for holding the state of the focus lens is supplied to the driver when the focus lens is stopped, and controls the supply of the holding power to the driver according to the result of the determination. | 03-22-2012 |
20120127591 | INTERCHANGEABLE LENS, CAMERA BODY, AND CAMERA SYSTEM - An interchangeable lens has a zoom lens, a zoom driver operable to drive the zoom lens along an optical axis, a focus lens, a focus driver operable to drive the focus lens along the optical axis, and a storage unit operable to store link information which links position information indicating a position of the zoom lens on the optical axis with information about a variation in magnification caused by the focus lens advancing and retreating on the optical axis with the zoom lens located at the position indicated by the position information. | 05-24-2012 |
20120212635 | INTERCHANGEABLE LENS, CAMERA BODY AND CAMERA SYSTEM - A camera body to which an interchangeable lens is mountable includes a receiving unit operable to receive speed information, a first controller unit operable to select a shooting mode from a moving image shooting mode and a still image shooting mode, a second controller unit capable of setting whether to operate in a silent mode provided for a situation where a drive sound of a drive unit in the interchangeable lens is desired to be at a low level during the moving image shooting mode, a third controller unit operable to generate a control signal for changing light amount which is changed by a diaphragm in the interchangeable lens, at a constant speed based on the speed information, when the moving image shooting mode is selected and the silent mode is not set, and a body transmitting unit operable to transmit the generated control signal to the interchangeable lens. | 08-23-2012 |
20130010373 | LENS CONTROL APPARATUS AND INTERCHANGEABLE LENS INCLUDING LENS CONTROL APPARATUS - A lens control apparatus, and an interchangeable lens including the lens control apparatus, are provided which can obtain, in zoom tracking operation, excellent optical images at subject distances in a wider range. A lens control apparatus controls drive of an optical system including a first and a second focus lens for adjusting a focus state and a zoom lens for adjusting an angle of view. The lens control apparatus includes: a first driver that drives the first focus lens; a second driver that drives the second focus lens; a controller that controls the first and second drivers; and a storage unit that stores first and second tracking data, the first and second tracking data each being information that associates a position of the first and second focus lenses respectively with a position of the zoom lens for focusing on a subject. | 01-10-2013 |