Telescope:
a. Confirm that all the lens covers have been removed from the telescope.
b. Confirm that the Flip-Mirror Control (7, Fig. 1) is in the "up" position if using the Eyepiece Holder (4, Fig. 1)
so light is directed to the eyepiece (1, Fig. 1). Confirm that the FlipMirror Control is in the "down" position if
using the #932 Erecting Prism or doing photography with the ETX.
c. If you are new to stargazing, first locate and focus on bright objects, such as the Moon, or a bright star or
planet, to acquaint yourself with the sky.
d. When objects appear in the viewfinder but not in the telescope, the viewfinder is not properly aligned with
the telescope. Before the ETX is used the first time, the viewfinder must be aligned to the main telescope.
Once aligned, locate objects in the viewfinder first, then move to the main telescope.
e. Air conditions inside a warm house or building may distort terrestrial or celestial images and make it
difficult, if not impossible, to obtain a sharp focus. For optimal viewing, use the telescope outside in the
open air instead of observing through an open or closed window or screen.
f.
For clear viewing of objects, turn the focus knob (5, Fig. 1) slowly since the "in-focus" point of a telescope is
precise.
g. The optics within your telescope need time to adjust to the outside ambient temperature to provide the
sharpest image. To "cool down" the optics, set your telescope outside for 10 to 15 minutes before you
begin observing.
5.
Meade Customer Service
If you have a question concerning your ETX telescope, call Meade Instruments Customer Service Department at
(949) 451-1450, or fax at (949) 451-1460. Customer Service hours are 8:30AM to 4:30PM, Pacific Time, Monday
through Friday. In the unlikely event that your ETX requires factory servicing or repairs, write or call the Meade
Customer Service Department first, before returning the telescope to the factory, giving full details as to the nature
of the problem, as well as your name, address, and daytime telephone number. The great majority of servicing
issues can be resolved by telephone, avoiding return of the telescope to the factory.
Specifications:
Optical Design
Maksutov-Cassegrain catadioptric
Primary Mirror Diameter
96mm (3.78")
Clear Aperture
90mm (3.5")
Focal Length
1250mm
Focal Ratio (photographic speed)
f/1 3.8
Near Focus (approx.)
11.5 ft. (3.5m)
Resolving Power (arc sees.)
1.3
Super Multi-Coatings (EMC)
Standard
Limiting Visual Steller Magnitude (approx.)
11.7
Image Scale
1.16°/inch
Maximum Practical Visual Power
325X
Optical Tube Dimensions (dia. x length)
4. 1" x 11" (1 0.4cm x 27.9cm)
Secondary Mirror Obstruction (dia.; %)
1.1" (27.9mm); 9.6%
Telescope Mounting
Fork type; double tine
Setting Circle Diameters
Dec: 3.5"; R.A.: 7"
RA Motor Drive System
4.5-volts DC
Hemispheres of Operation
North and South, switchable
Slow-Motion Controls
Manual, R.A. and Dec
Bearings
R.A. and Dec.: Nylon
Materials: Tube body
Aluminum
Mounting
High-impact ABS, steel reinforced
Primary Mirror
Pyrex® glass
Correcting Lens
BK7 optical glass, Grade-A
Telescope Dimensions
15" x 7.3" x 8.5" (38cm x 18.5cm x 21.6cm)
Telescope (Incl. tabletop tripod) Net Weight
9.2 lbs. (4.2 kg)
Telescope Shipping Weight
12.4 lbs. (5.6kg)
Summary of Contents for ETX Series
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