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The ETX started out as a 90 mm (3-1/2") Maksutov Cassegrain telescope (first produced in 1996) and took advantage of high volume mass production and simplified optical and parts construction to open a new market for a cheap alternative to the very expensive Questar 3-1/2 Maksutov Cassegrain [1] [2] The ETX "line" has been expanded to 105 mm, and 125 mm Maksutov Cassegrains and achromatic ...
Positioning an optical telescope in space eliminates the distortions and limitations that hamper that ground-based optical telescopes (see Astronomical seeing), providing higher resolution images. Optical telescopes are used to look at planets , stars , galaxies , planetary nebulae and protoplanetary disks , amongst many other things.
Live broadcasting websites exist for sharing live video astronomy feeds. [ 4 ] [ 5 ] Video astronomy, combined with remote control of a telescope, allows anyone including disabled people to operate a telescope remotely, or observers in a light-polluted area to operate a telescope in another area, even another country.
Telescopes can be classified by optical design or mechanical design/construction. Telescopes can also be classified by where they are placed, such as space telescopes . One major determining factor is type of light, or particle being observed including devices referred to as "telescopes" that do not form an image or use optics.
Slooh is a robotic telescope service that can be viewed live through a web browser. It was not the first robotic telescope, but it was the first that offered "live" viewing through a telescope via the web. [2] Other online telescopes traditionally email a picture to the recipient. The site has a patent on their live image processing method. [3]
We pick the best lenses for astrophotography fans shooting a starry night sky, to suit a range of cameras and budgets Skip to main content. Sign in. Mail. 24/7 Help. For premium support please ...