This is an impressive feat of optical engineering. I tested the Nexus coma corrector with two different Newtonian astrographs: a GSO 8-inch f/3.9 and a 10-inch f/3.9.

Optical design: Newtonian reflector Aperture: 2.99" (76 mm) Focal ... The Newtonian reflector is supplied with two eyepieces — 20 mm and 4 mm — and possesses a fast focal ratio to provide a ...

Optical design: Newtonian Reflector. Mount: EQ5 Equatorial German Mount. Focal length: 1000mm. Aperture: 8-inches (203.2mm) Payload capacity: 20 lb (9.07 kg) Weight and size.

Optical design: Newtonian reflector Mount type: Alt-azimuth Aperture: 130mm (5.11 inches) Focal length: 650mm (25.59 inches) Magnification: 26x and 65x ...

Simply put, a Dobsonian telescope is a type of large aperture Newtonian telescope design popularised by John Dobson back in the mid 1960s, and from whom it takes its name.

Parks Optical’s AZ6 6-inch f/6 Astrolight Newtonian reflector rides on an alt-azimuth mount atop a steel pier. This puts the scope at eye level for most observers.

Dobsonian telescopes have a simple Newtonian optical design and wooden mounts, and are a very cost effective (if sometimes bulky) option for larger apertures.

Researchers have developed a programmable meta-fluid with tunable springiness, optical properties, viscosity and even the ability to transition between a Newtonian and non-Newtonian fluid. The ...