Meade ETX-70AT Junior Manuel D'instructions page 63

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telescope moves off a terrestrial object while observing:
• Verify that the vertical and horizontal locks have been tightened to a „firm feel" (6 and 9 Fig. 1).
telescope pauses when changing slew direction:
• This pause is normal.
A terrestrial object appears reversed left-for-right:
• An eyepiece in the standard 90° observing position (3, Fig. 1) yields this image orientation. To
view a correctly oriented image, the Erecting Prism is required.
telescope won't move
• Axis clamps undone
• Tighten the axis clamps
the image is upside down
• Amici prism not inserted
• Normal in astronomy telescopes; use the Amici prisms for terrestrial observation
motor noises
• Motor noise is normal and not a fault
ETX-70AT specifications
Optical design .................................................................Achromatic Refractor
Clear aperture
ETX-70AT ...............................................................70mm (2.76")
Focal length ....................................................................350mm
Near focus (approx.)
ETX-70AT ...............................................................17 ft. (5.2m)
Maximum practical visual power
ETX-70AT ..............................................................240X
Optical tube dimensions
(dia. x length) ..........................................................9.3cm x 30.4-37.1cm (3.6" x 12-14.6")
Eyepieces
Modified Achromatic ...............................................MA 25mm (1.25" O.D.)
Modified Achromatic ...............................................MA 6mm (1.25" O.D.)
Telescope mounting .......................................................Fork type; double tine
Setting circle diameters ..........................................Dec: 3.5"; RA: 7"
Input voltage ...........................................................9-volts DC
Motor Drive System ................................................DC servo motors with encoders, both axes
Slow-Motion Controls .....................................................Electric, 9 speed, both axes
Hemispheres of operation ..............................................North and South, switchable
Bearings:
Altitude ....................................................................Acetal
Azimuth ...................................................................Nylon
Materials
Tube body ...............................................................ABS
Mounting ................................................................High-impact ABS
Objective lens (crown, flint) ....................................BK7, F2
Telescope dimensions ....................................................40.4cm x 18cm x 22cm (15.9" x 7" x 9")
Telescope net weight: (telescope only, without batteries, eyepieces)
ETX-70AT ................................................................2.7 kg (5.9 lbs.)
Telescope shipping weight
(telescope, accessories, instruction manual and packing)
ETX-70AT ................................................................5.3 kg (11.7 lbs.)
Autostar specifications
Processor
................................................................................
Flash Memory ................................................................ 512KB, reloadable
Keypad ........................................................................... 10 key alphanumeric
Display ............................................................................ 2 line, 16 character LCD
Backlight ......................................................................... Red LED
Coil Cord ........................................................................ 24"
68HC11, 8MHz
Maintenance 27