Meade Customer Service Department first, before returning the telescope to the factory
, giving full particulars
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: ETX-90EC Telescope
Optical design
Maksutov-Cassegrain
Primary mirror diameter
96mm (3.78")
Clear aperture
90mm (3.5")
Focal length
1250mm
Focal ratio (photographic speed)
f/13.8
Near focus (approx)
11.5 ft (3.5m)
Resolving power
1.3 arc secs
Super multi-coatings
standard
Limiting visual stellar magnitude (approx)
11.7
Image scale
1.16°/inch
Maximum practical visual power
325X
Optical tube dimensions (dia. x length)
10.4cm x 27.9cm (4.1" x 11")
Secondary mirror obstruction (dia.; %)
27.9mm (1.1"); 9.6%
Telescope mounting
fork type; double tine
Setting circle diameters
Dec: 3.5"; RA: 7"
Input voltage
12-volts DC
Hemispheres of operation
north and south, switchable
Electronic controller
4 speed, both axes
Bearings:
Altitude
UHMW Polyethylene
Azimuth
PTFE
Materials:
Tube body
aluminum
Mounting
high-impact ABS, aluminum-reinforced
Primary mirror
Pyrex® glass
Correcting lens
BK7 optical glass, Grade-A
Telescope dimensions
38cm x 18cm x 22cm (15" x 7" x 9")
Telescope net weight: (incl. Electronic Controller & batteries)
3.5kg (7.8 lbs)
Telescope shipping weight
5.6kg (12.3 lbs)
