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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.
Chrome Portion
Eyepiece Holder
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" eye-
piece 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
#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.
Eyepiece
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:
2. Slide the chrome portion of the eyepiece into the star
3. Tighten the set screw on the star diagonal to hold the
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
larger the number), the lower the eyepiece magnification.
The shorter the focal length (i.e., the smaller the number),
(#12031, #12079,
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. "
Installing the 6x30 Finderscope
with 6x30 finderscopes used to help you locate and center
objects in the main field of your telescope. To accomplish
this, the finder has a built-in cross-hair reticle that shows the
optical center of the finderscope. To install the finderscope:
1. Attach the bracket to the optical tube. To do this, place
no longer extends into the inner diameter of the eyepiece
end of the diagonal.
diagonal.
eyepiece in place.
the curved portion of the bracket with the slot over the
two holes in the rear cell. The bracket should be oriented
so that the rings that hold the finder are over the telescope
tube, not the rear cell. Start threading the screws in by
hand and tighten fully with an screw driver
Eyepiece
Star
Diagonal
I 27
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