Lens apparatus and camera system
A lens apparatus comprises a barrel 100 which houses an imaging optical system including magnification-varying lens units 26 and 27 , a focus lens unit 25 , and a beam separation element 29 which separates a part of a light beam from an object out of a light beam directed to an imaging surface, operating members 1, 2 , and 3 disposed on an outer circumference of the barrel and configured to be manually operated, a drive unit 200 disposed outside the barrel and including actuators 45 and 50 which drives each of the magnification-varying lens unit and the focus lens unit, and a controller 60 which controls the actuator, and a focus detector 31 disposed outside the barrel and configured to detect a focus state of the imaging optical system using the light beam separated by the beam separation element. The focus detector is embedded in the drive unit.
1. A lens apparatus comprising:
a barrel which houses an imaging optical system including a magnification-varying lens unit, a focus lens unit, and a beam separation element which separates a part of a light beam from an object out of a light beam directed to an imaging surface;
an operating member disposed on an outer circumference of the barrel and configured to be manually operated;
a drive unit disposed outside the barrel and including an actuator which drives each of the magnification-varying lens unit and the focus lens unit, and a controller which controls the actuator; and
a focus detector disposed outside the barrel and configured to detect a focus state of the imaging optical system using the light beam separated by the beam separation element,
wherein the focus detector is embedded in the drive unit.
2. A lens apparatus comprising:
a barrel which houses an imaging optical system including a magnification-varying lens unit, a focus lens unit, and a beam separation element which separates a part of a light beam from an object out of a light beam directed to an imaging surface;
an operating member disposed on an outer circumference of the barrel and configured to be manually operated;
a drive unit disposed outside the barrel and including an actuator which drives each of the magnification-varying lens unit and the focus lens unit, and a controller which controls the actuator; and
a focus detector disposed outside the barrel and configured to detect a focus state of the imaging optical system using the light beam separated by the beam separation element,
wherein the focus detector is housed in a housing different from that of the drive unit which is disposed along an outer surface of the drive unit.
3. A lens apparatus according to claim 2 ,
wherein at least one of the housings of the focus detector and the drive unit is provided with an electric connector for inputting a signal from the focus detector to the controller.
4. A lens apparatus according to claim 2 ,
wherein an electromagnetic shield member is disposed between the actuator and the focus detector.
5. A camera system comprising:
a lens apparatus; and
a camera on which the lens apparatus is detachably mounted and configured to perform a photoelectric conversion of an optical image of an object to generate a shooting image,
wherein the lens apparatus comprises:
a barrel which houses an imaging optical system including a magnification-varying lens unit, a focus lens unit, and a beam separation element which separates apart of a light beam from an object out of a light beam directed to an imaging surface;
an operating member disposed on an outer circumference of the barrel and configured to be manually operated;
a drive unit disposed outside the barrel and including an actuator which drives each of the magnification-varying lens unit and the focus lens unit, and a controller which controls the actuator; and
a focus detector disposed outside the barrel and configured to detect a focus state of the imaging optical system using the light beam separated by the beam separation element, and
wherein the focus detector is embedded in the drive unit.
6. A camera system comprising:
a lens apparatus; and
a camera on which the lens apparatus is detachably mounted and configured to perform a photoelectric conversion of an optical image of an object to generate a shooting image,
wherein the lens apparatus comprises:
a barrel which houses an imaging optical system including a magnification-varying lens unit, a focus lens unit, and a beam separation element which separates a part of a light beam from an object out of a light beam directed to an imaging surface;
an operating member disposed on an outer circumference of the barrel and configured to be manually operated;
a drive unit disposed outside the barrel and including an actuator which drives each of the magnification-varying lens unit and the focus lens unit, and a controller which controls the actuator; and
a focus detector disposed outside the barrel and configured to detect a focus state of the imaging optical system using the light beam separated by the beam separation element, and
wherein the focus detector is housed in a housing different from that of the drive unit which is disposed along an outer surface of the drive unit.