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.

With Newtonian designs, the two mirrors within the tube should be aligned and astronomers usually achieve this process — known as collimation — using thumbscrews to adjust the optical system.

Optical design: Newtonian Aperture: 127mm Focal length: 39-inches/1000 mm Lowest useful magnification: 20x Highest useful magnification: 250x Total kit weight: 22lbs/10 kg Mount type: German ...

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.

The researchers’ design focuses on the uses of quantum states and the related optimizations that may be out of a classical computer’s reach.

The compound optical design eliminates two fundamental drawbacks of the mirror-only Newtonian reflector: astigmatism (where light rays focus at different points) and coma (where stars at the edge ...

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