And the reflector is key for measuring the ... This instrument includes 100 "corner cubes" (or fused silica half-cubes), which are placed in an 18-inch-square (46 centimeters square) aluminum ...

For this review, the 8-inch version with the EQ5 mount was tested. Optical design: Newtonian Reflector Mount: EQ5 Equatorial German Mount Focal length: 1000mm Aperture: 8-inches (203.2mm ...

Back in 1969, my first telescope was a 4-inch reflector that had appalling optics and a wobbly mount. It sold for $29.95. According to the United States Department of Labor, inflation has made ...

IT was reported in the Times of March 27 that an accident had occurred during the pouring of the twenty tons of glass into the mould of the two hundred inch mirror for the new reflector for the ...

The problem in using a normal solar filter with a reflector is that ... completely covers the front of your scope but has a 2-inch-diameter (or so) hole that transmits the light.

IT is stated by the New York correspondent of The Times that the 200-inch disk began its 3,300-mile railway journey from Corning, New York, to Pasadena on March 26. It is encased in a steel crate ...