Care And Maintenance; Specifications - Orion XT4.5 Instruction Manual

ly, until the telescope is centered on the new star.
Continue using stars as guideposts in this way until you are
the approximate position of the object you are trying to find
(Figure 15). Look in the telescope's eyepiece, and the object
should be somewhere within the field of view. If it's not,
sweep the telescope carefully around the immediate vicinity
until the object is found.
If you have trouble finding the object, start the starhop again
from the brightest star near the object you wish to view. This
time, be sure the stars indicated on the star chart are in fact
the stars you are centering in the finder scope and telescope
eyepiece. Remember the telescope gives you inverted
images, but the finder scope does not.

6 Care and Maintenance

If you give your telescope reasonable care, it will last a life-
time. Store it in a clean, dry, dust free place, safe from rapid
changes in temperature and humidity. Do not store the tele-
scope outdoors, although storage in a garage or shed is OK.
Small components like eyepieces and other accessories
should be kept in a protective box or storage case. Keep the
caps on the front of the scope and on the focuser when it is
not in use. For maximum protection during storage, we rec-
ommend placing the telescope in a case to prevent any dust
and moisture from accumulating on exposed surfaces.
The telescope requires very little mechanical maintenance.
The optical tube is made of steel and has a smooth painted
finish that is fairly scratch-resistant. If a scratch does appear
on the tube, it will not harm the telescope. If you wish, you
may apply some auto touch-up paint to the scratch. Smudges
on the tube can be wiped off with a soft cloth and a household
cleaner such as Windex or Formula 409.
Refer to Appendix B for detailed instructions on how to clean
the optics of the SkyQuest XT4.5.

7. Specifications

Focal Length: 900mm
Aperture: 114mm (4.5")
Focal Ratio: f/7.9
Mirror Coatings: aluminum with SiO
Minor Axis of secondary mirror: 28mm
Weight: 17.6 lbs. (tube and base)
Tube Length: 35"
Tube Outer Diameter: 5.5"
overcoat, 89% reflective
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