Two factors determine the true field: the telescope's focal length and the diameter of the eyepiece's field stop. A field stop is a centered, circular opening in front of the eyepiece's front (or ...

From eyepieces to travel scopes, these products caught the eye of Astronomy Contributing Editor Phil Harrington on the NEAF ...

Get a good view from anywhere with this high definition monocular telescope, now $22.97, 58% off, through April 27.

Vaonis' Hestia combines a telescope and camera into an all-in-one package that will turbocharge your phone for astroimaging.

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 ...

Get a huge discount on the Celestron StarSense Explorer LT 80AZ telescope in time for the upcoming Lyrid meteor shower, full ...