Newtonian Reflector


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Newtonian Reflector

 

a type of reflecting telescope in which the rays reflected by the primary parabolic mirror are intercepted by a plane mirror and reflected to the side of the telescope tube, where the light-receiving equipment is located. Used only in small telescopes, it was designed by I. Newton around 1670.

References in periodicals archive ?
An altazimuth variation that's popular on Newtonian reflectors of all sizes (from $200 starter scopes to 36-inch monsters) is the Dobsonian mount.
But when I mounted the camera on my 12 1/2-inch f/4 Newtonian reflector with its steeper light cone the image vignetted considerably.
This versatile and portable telescope is a 4.25-inch (105-mm) Newtonian reflector with a focal length of 445 mm (f/4).
It was an Edmund 4 1/4-inch Newtonian reflector, a popular model for many of us starting in astronomy in those days.
Caroline Herschel discovered NGC 7789 in October 1873 with a 4.2-inch Newtonian reflector made for her by her brother William.
Here is a 4.5-inch (114-mm) Newtonian reflector with a focal length of 910 mm (f/8) that comes with a German equatorial mount and a gold-anodized aluminum tripod.
Many of these optical marvels command prices surpassing a decent 8-inch Newtonian reflector complete with an equatorial mount.
Extraordinary detail is visible on Jupiter's cloudtops in this tricolor CCD image obtained September 4, 1999, with a 10-inch f/8 Newtonian reflector from Di Sciullo's home in Coconut Creek, Florida.
I had the opportunity to use both eyepieces on several large Dobsonians, as well as my own 121/2-inch Newtonian reflector. Needless to say, the views are impressive.
This photographically fast Newtonian reflector is built around a 150-mm parabolic primary mirror manufactured from B270 glass that reaches thermal equilibrium quickly.