From magnification to light-gathering, here’s how to make the decision between buying a telescope or a monocular for ...

To reduce distortions such as elongations and blurriness caused by the curvature of the "objective" lens—the convex lens at the far end of the telescope—Galileo ground a lens larger than he ...

While, therefore, the micro-telescope and the ordinary telescope with erecting eyepiece have the same sequence and function of lenses ... The triple objective in the micro-telescope, though ...

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 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 ...

nothing beats the best telescopes for stargazing. If you're keen on dual-purpose 'bins' for daytime birdwatching and moongazing, consider ones with large light-gathering objective lenses.

Opt for models with objective lenses of 40-50mm or larger to gather ... possible for deep-sky objects without using one of the best telescopes, the Celestron SkyMaster 25x100 are $30 off and ...

the unit's large size may present challenges for individuals with smaller hands.The Rangemaster monocular boasts a 52mm objective lens, giving it the appearance of a small telescope rather than a ...