10 • Getting Started
The Celestron C5 comes with a 8x20mm finder that helps in aiming at distant
objects that are hard to find in the narrow field of the spotting scope. The first
number used to describe the finder is the power while the second number is the
diameter of the objective lens in millimeters. This means the 8x20 finder is 8 power
and has a 20mm objective lens. Incidentally, power is always compared to the
unaided human eye. So a 8 power finder magnifies images eight times more than the
human eye.
To make the alignment process a little easier, you should perform this task in
the daytime when it is easier to locate objects in the spotting scope without the
finder. To align the finder:
1. Choose a conspicuous object that is in excess of one mile away. This will
eliminate any possible parallax effect.
2. Point your spotting scope at the object you selected and center it in the main
optics of the spotting scope.
3. Check the finder to see where your alignment target is located in the field
of view.
4. Adjust the screws on the finder bracket, tightening one while loosening
another, until the cross hairs are centered on the target.
5. Tighten each set screw a quarter of a turn to ensure that they will not
come loose easily.
Aligning the Finder
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