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In amateur astronomy, "GoTo" refers to a type of telescope mount and related software that can automatically point a telescope at astronomical objects that the user selects. Both axes of a GoTo mount are driven by a motor and controlled by a computer. It may be either a microprocessor-based integrated controller or an external personal computer.
Other telescope product lines include the CGE, CGEM, CPC, NexStar, Omni, Onyx, AstroMaster, Ambassador, TravelScope,StarSense Explorer and PowerSeeker product lines. [10] These range from large computerized reflectors with GPS to decorative/casual viewing telescopes with brass tube refractors on wood mounts. Celestron products (as of 2010) include:
Since the invention of digital tracking systems, altazimuth mounts have come to be used in practically all modern large research telescopes. Digital tracking has also made it a popular telescope mount used in amateur astronomy. [4] Besides the mechanical inability to easily follow celestial motion the altazimuth mount does have other limitations.
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.
Digital cameras also have minimal or no moving parts and the ability to be operated remotely via an infrared remote or computer tethering, limiting vibration. Simple digital devices such as webcams can be modified to allow access to the focal plane and even (after the cutting of a few wires), for long exposure photography.
The Sony E-mount was brought to the 35 mm video camera market with the Sony NEX-FS100. [6] The first third-party camera to use the E-mount was the Hasselblad Lunar, announced at Photokina on 18 September 2012 and released in early 2013. [7] [8] In September 2013, Sony announced the first model from new ILCE series, the Sony α3000.
A progressive scan camera captures all scan lines at the same time, whereas an interlaced camera uses alternating sets of lines. Image sensors provide only monochrome images. With a 1-chip camera, color information can be obtained through the use of color filters over each pixel. With 1-chip cameras, the Bayer filter is very commonly used. Red ...
Classical Dobsonian mount parts are typically made from plywood and other cheap materials which are glued, screwed, or even nailed together. In contrast to other telescope mount types, no precision-machined mechanical parts are required. For smooth sliding motions, small Teflon (PTFE) blocks are used for the seven supports. Their surface sizes ...
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