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

Because his telescope offered a much greater field of view, astronomers had plenty of room to improve magnification. One way to do that, they knew, was to make the focal length of the eyepiece ...

And if telescopes don't quite align with your celestial ... and delivers a lot for its reasonable price tag. There's a 900mm focal length, f/6.92 aperture and two eyepieces (10mm and 25mm ...

Save over $400 on the Sky-Watcher SkyMax 180 which features in our best telescopes for seeing planets guide. With a long focal length (180mm and 2700mm respectively), its precision is almost ...

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 ...

With totimorphic lattices, the telescope could change its focal length by adapting the curvature of its lens. This would enable the launch of a single, multipurpose telescope that could adapt and ...

Bath Preservation Trust The telescope is constructed with two concave mirrors with a focal length of 18 inches, and sits on an equatorial mount The museum is dedicated to the achievements of ...