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ENGLISH I 25
4. Locate the mounting bracket near the front (open) end
of the telescope.
5. Loosen the set screw on the mounting bracket on the
telescope.
6. Slide the finder bracket (attached to the finderscope)
into the mounting bracket on the telescope.
7. The finderscope bracket will slide in from the back.
The finderscope should be oriented so that the objective
lens is toward the front (open) end of the telescope.
8. Tighten the set screw on the mounting bracket to hold
the finderscope in place.
Installing the Eyepieces
The eyepiece, or ocular as it is also called, is an optical
element that magnifies the image focused by the telescope.
Without the eyepiece, it would be impossible to use the
telescope visually. The eyepiece fits directly into the
eyepiece holder. To attach an ocular:
1. Loosen the set screw on the eyepieceholder so that it
does not obstruct the inner diameter of the eyepiece
holder.
2. Slide the chrome portion of the eyepiece into the
eyepiece holder.
3. Tighten the set screw to hold the eyepiece in place.
To remove the eyepiece, loosen the setscrew on the eyepiece
holder and slide the eyepiece out. You can replace it with
another ocular. Eyepieces are commonly referred to
by focal length which is printed on the eyepiece barrel. The
longer the focal length (i.e., the larger the number), the lower
the eyepiece magnification. The shorter the focal length (i.e.,
the smaller the number), the higher the eyepiece magnification.
Generally, you will use low-to-moderate power when viewing.
If you have the 8” Newtonian optical tube (#32062), your
telescope can use eyepieces with both a 1.25” and 2” barrel
diameters. To use a 2” barrel eyepiece, the 1.25” eyepiece
adapter must first be removed and replaced with the
included 2” eyepiece adapter. To do this, simply loosen the
two chrome thumbscrews located around the focuser barrel
and remove the 1.25” adapter. Once removed, a 2” eyepiece
adapter can be inserted directly into the focuser barrel and
secured with the two thumb screws.
Setting up the EdgeHD and Schmidt-
Cassegrain Optical Tubes (#12031, #12033,
#12079, #12025, #12026, #12046 and #12067)
Installing the Star Diagonal
The star diagonal is a prism that diverts the light at a right
angle to the light path of the telescope. This allows you to
observe in positions that are physically more comfortable
than if you looked straight through. To attach the star
diagonal onto the optical tube:
1. Turn the set screw on the visual back until its tip no
longer extends into (i.e., obstructs) the inner diameter
of the visual back.
2. Slide the chrome portion of the star diagonal into the
visual back.
3. Tighten the set screw on the visual back to hold the
star diagonal in place.
If you wish to change the orientation of the star diagonal,
loosen the set screw on the visual back until the star
diagonal rotates freely. Rotate the diagonal to the desired
position and tighten the set screw.
Installing the Eyepiece
The eyepiece, or ocular, is an optical element that magnifies
the image focused by the telescope. The eyepiece fits into
either the visual back directly or the star diagonal. To install
an eyepiece:
1. Loosen the set screw on the star diagonal until the tip
no longer extends into the inner diameter of the eyepiece
end of the diagonal.
2. Slide the chrome portion of the eyepiece into the star
diagonal.
3. Tighten the set screw on the star diagonal to hold the
eyepiece in place.
To remove the eyepiece, loosen the set screw on the star
diagonal and slide the eyepiece out. You can replace it with
another eyepiece (purchased separately).
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
Eyepiece
Eyepiece Holder
Chrome Portion
Star
Diagonal
Visual Back
Eyepiece
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