Building a better refractor The spyglass-turned-telescope had limitations, some of which Galileo was able to design around. To reduce distortions such as elongations and blurriness caused by the ...

The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting ...

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 ... Placing the tracking clock within an opening in the pier was a new design by Warner and Swasey. When ...

THE Yerkes Observatory, which has recently been completed and inaugurated, contains in its instrumental equipment the largest refractor in the world, the diameter of the object-glass spanning 40 ...

The Beaverlab Finder TW2 is not a smart telescope, but its design makes it unique. This 82mm/3.2-inch refractor is one of a kind in that a lightweight plastic camera can be attached to it in place ...

The original instrument to occupy the dome was the 10.5-inch Bausch telescope, which was installed in the new observatory building in 1953. The 25-foot diameter dome was necessary to encompass the ...

Dobsonians are based on the reflector telescope design that sees a large primary mirror collect light then reflect it back into a secondary mirror (here's an explainer of the different telescope ...