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The Eyepiece
The eyepiece, or ocular, is the optical element that magnifies the image focused
by the spotting scope. The eyepiece fits into either the visual back directly or the
erect image diagonal. To install an ocular:
1. Loosen the thumbscrew on the star diagonal (or erect image diagonal) so it
does not obstruct the inner diameter of the eyepiece end of the diagonal.
2. Slide the chrome portion of the eyepiece into the star diagonal (or erect
image diagonal).
3. Tighten the thumbscrew to hold the eyepiece in place.
To remove the eyepiece, loosen the thumbscrew on the star diagonal and slide the
eyepiece out.
Eyepieces are commonly referred to by focal length and barrel diameter. The
focal length of each eyepiece is printed on the eyepiece barrel. The longer the
focal length (i.e., the larger the number) the lower the eyepiece power or
magnification; and the shorter the focal length (i.e., the smaller the number) the
higher the magnification. Generally, you will use low-to-moderate power when
viewing. For more information on how to determine power, see the section on
“Calculating Magnification.”
Barrel diameter is the diameter of the barrel that slides into the diagonal or visual
back. The C5 spotting scope use eyepieces with a standard 1-1/4" barrel
diameter.
Finderscope
The C5 spotting scope come standard with a terrestrial (erect image) 6x30 finder.
The purpose of the finder is to locate objects that might otherwise be overlooked
in the narrow, higher power field of view of the spotting scope.
Attaching the Finder to the Bracket
1. Unthread the three screws in the finder bracket. until the ends are flush with
the inner diameter of the bracket ring. Do not thread them in completely
or they will interfere with the placement of the finder.
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