Telrad - Telrad Hinged Deluxe Dew Cap

To see objects through a telescope it must be pointed to exactly the right
spot. The Telrad is sight for pointing telescopes to that ″right
spot″.

Through a Telrad you see the sky the way the star charts show it. Not a small
unside-down and magnified portion of it, but the ″real sky″ with
three lighted target rings set against it. The large ring is 4 degrees
across. It outlines the area covered by a finderscope. The small ring is 1/2
degree across and outlines the area seen in the telescope.