I: 02 – Observing Teams and Equipment Procedures - © 2012 BDM Page 3
4. Using the Telrad Finder
The Telrad finder is easy to use. Unlike most telescope finders, the Telrad does not magnify
the image. It works much as a rifle sight does by projecting a "Bulls-Eye", or three red
concentric rings, spaced at 4 degrees, 2 degrees, and 1/2 degree in diameter in which to
center the desired astronomical object.
Telrad Finder Alignment Procedure
1. With a low power eyepiece in the telescope,
locate a “test object”, such as a bright star or
planet.
2. Adjust the telescope to view the “test object” in
the center of the field of view.
3. Turn on the Telrad (on/off switch) and adjust the
brightness of the red concentric “Bulls-Eye”
reticle while looking through the Telrad.
4. Compare where the “test object” is in relation to
the Telrad “Bulls-Eye”. Adjust the three Reticle
Alignment screws (up/down & left/right) to center
the “test object” in the middle of the three red
concentric circles of the reticle (see photo
below.) You may have to check the view through
the eyepiece to make sure the “test object” has
not moved appreciably.
Telrad Alignment and Adjustment settings
“Bulls-Eye” Reticle centered on star
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