Mars is on the cusp of becoming bigger and brighter than at any point since 2022 as it comes into alignment with Earth and ...

Description: Specifications TV - 76TypeAPO (Doublet) Refractor (Elements/Groups: 2/1) Objective (mm) 76 Focal Length (mm) 480 Focal Ratio (f/#) 6.3 Drawtube/Focuser2-in ch, Focusmate dual-speed ...

Description: Specifications TV - 85TypeAPO (Doublet) Refractor (Elements/Groups: 2/1) Objective (mm) 85 Focal Length (mm) 600 Focal Ratio (f/#) 7 Drawtube/Focuser2-in ch, Focusmate dual-speed ...

Designers of refracting telescopes figured out, for one, that by using two different kinds of glass together in the objective lens, they could cause the red and blue ends of the spectrum to ...

The original instrument to occupy the 25-foot diameter dome was the 10.5-inch Bausch refracting telescope (f/15.5) installed in the brand new observatory in 1953. Bausch & Lomb Company gave the ...

9.53 inch Clark Refractor The main telescope is the original 9.53 inch refractor built in 1885. The objective lens was made by Alvin Clark and Sons of Cambridge, Massachusetts, and has a focal length ...

The standard telescope of Newton's time, the refracting telescope, was not ideal. Its glass lenses focused the different colors inherent in light at different distances. This resulted, at the ...

This 82mm/3.2-inch refractor is one of a kind in that ... an image of the moon by holding your smartphone's camera lens up to a telescope's eyepiece, you'll know it's a tricky maneuver.

The second floor consists of the Equatorial Room which is home to the star of McKim Observatory: a Clark Refracting Telescope with a 9.53” objective lens made by the renown Alvin Clark and Sons. The ...

After all, as a refractor telescope it uses a lens to form an image so it’s necessary to stand behind the optical tube to look through an eyepiece. There are fewer telescopes easier to set-up ...