Bausch & Lomb Company gave the University of Colorado a 10.5-inch refractor, formerly the property of Carl L. Bausch. The telescope was designed by George Saegmuller, a B&L designer, in 1912.

The first refractor lens labeled “color-free” was a triple lens system offered by Astro-Physics in 1981. Only two “apochromatic” lenses were available at that time, both f/11 magnesium ...

Compound, or catadioptric, telescopes combine lenses and mirrors for a compact option, suitable for both planetary and ...

Refractor telescopes use a series of glass lenses to collect and focus the light. They are excellent for viewing the moon or larger (or closer) planets.

Refractor telescopes use a series of glass lenses to collect and focus the light. They are excellent for viewing the moon or larger (or closer) planets.

It was a memorial to her late husband, Dr. Edward P. Burrell. The observatory houses a Warner & Swasey refracting telescope with a 13 3/8-inch objective, a 4½-inch finder and a 1-inch finder.

Top refractor telescope for the money Celestron 70 Millimeter Portable Refractor Telescope What you need to know: The perfect size for grab-and-go astronomers, this telescope has a 70-millimeter ...

Top refractor telescope for the money Celestron 70 Millimeter Portable Refractor Telescope What you need to know: The perfect size for grab-and-go astronomers, this telescope has a 70-millimeter ...

Refractor telescopes use a series of glass lenses to collect and focus the light. They are excellent for viewing the moon or larger (or closer) planets.

The telescope marked the 400th anniversary of Galileo’s first telescope, which he presented to policy-makers from the Venetian Republic on 25 August 1609. The Galileoscope is a 50 mm-diameter, 25- to ...

Features and Benefits: This refractor telescope offers bright, clear images, suitable for both terrestrial and celestial viewing. It comes with multiple eyepieces and an easy-to-use Altazimuth mount.