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If the camera were stationary, the tracks of the much more slowly moving stars appeared as much shorter lines, which were portions of arcs about the pole. If the volunteer had a motor-driven polar-axis camera mount that countered the Earth's rotation, the stars were represented by dots whose sizes depended on the resolution of the camera lens ...
A large German equatorial mount on the Forststernwarte Jena 50cm Cassegrain reflector telescope. An equatorial mount is a mount for instruments that compensates for Earth's rotation by having one rotational axis, called polar axis, parallel to the Earth's axis of rotation. [1] [2] This type of mount is used for astronomical telescopes and cameras.
In the Northern Hemisphere, rough alignment can be done by visually aligning the axis of the telescope mount with Polaris.In the Southern hemisphere or places where Polaris is not visible, a rough alignment can be performed by ensuring the mount is level, adjusting the latitude adjustment pointer to match the observer's latitude, and aligning the axis of the mount with true south or north by ...
An altazimuth mount or alt-azimuth mount is a simple two-axis mount for supporting and rotating an instrument about two perpendicular axes – one vertical and the other horizontal. Rotation about the vertical axis varies the azimuth (compass bearing) of the pointing direction of the instrument.
An Axis 2100 Network Camera, released in 1999. An AXIS P3717-PLE Network Camera, manufactured in 2019, has four adjustable camera heads enabling 360-degree coverage of an area. [41] Body Cameras – In 2020, Axis Communications entered the body camera market, competing with market incumbents Axon, Digital Ally, Wolfcom and Motorola Solutions ...
A camera is mounted on the top board, usually with some sort of ball joint to allow the camera to be pointed in any direction. The hinge is aligned with a celestial pole and the boards are then driven apart (or together) at a constant rate, usually by turning a threaded rod or bolt. This is called a tangent drive.
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