instruction Manual
IN 350 Rev. A 10/08
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orion
®
Premium 110mm
f/7.0 ED refractor
#9206 Optical Tube Assembly
Figure 1.
The Premium 110mm f/7.0 ED Refractor optical tube assembly
Dovetail
mounting plate
Focus wheel
Tube rings
Focus lock
thumbscrew
Lens shade
thumbscrew
Extendable
lens shade
Congratulations on your purchase of an Orion Premium
110mm f/7.0 ED refractor optical tube. Your telescope
has been designed with high quality optics and excellent
mechanical construction. The ED glass in the objective lens
means you’ll enjoy images with far less chromatic aberra-
tion than those seen in a standard refractor, and the smooth
dual-speed Crayford focuser will make getting sharp images
a breeze. These instructions will help you set up and use
your telescope.
Getting started
The Premium 110mm f/7.0 ED comes fully assembled from
the factory. The telescope’s optics have been installed and
col limated, so you should not have to make any adjustments
to them.
Please keep the original shipping box! In the unlikely event
you should need to ship the telescope back to Orion for war-
ranty repair service, you should use the original packaging.
The box also makes a very good container for storing the tele-
scope when it is not in use.
Mounting the telescope
The Premium 110mm ED refractor can be mounted on Orion
equatorial mounts using the included tube rings and dovetail
mounting plate. The dovetail mounting plate connects directly
to the equatorial mount’s dovetail holder. The dovetail holder
has two securing knobs to keep the dovetail plate securely in
place. Be sure to loosen these two knobs prior to connecting
the telescope to the mount. While grasping the telescope firm-
ly, place the dovetail mounting plate into the mount’s dovetail
holder and tighten the clamping knobs to secure the optical
tube.
An equatorial mount is desirable for astronomical viewing as
it allows easy manual and/or motorized electronic tracking of
celestial objects as the Earth rotates. Setting circles on equa-
torial mounts also enable you to locate objects by their celes-
