Meade etx-80at 사용자 설명서

If you have a question concerning your ETX-80AT-BB, contact the Meade Instruments Customer
Service Department at:

Telephone: (800) 626-3233

Customer Service hours are 8:00 AM to 5:00 PM, Pacific Time, Monday through Friday. In the
unlikely event that the ETX requires factory servicing or repairs, write or call the 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.

Optical design ................................................................Achromatic Refractor

Clear aperture ..........................................................80mm (2.76”)

Focal length ....................................................................400mm 
Focal ratio (photographic speed)....................................f/4.4
Near focus (approx.) ......................................................17 ft. (5.2m)
Resolving power ............................................................1.6 arc secs
Multi-coatings on objective lens ....................................Standard
Limiting visual stellar magnitude (approx.) ....................11.5

Image scale ....................................................................4.1°/inch
Maximum practical visual power ....................................240X
Optical tube dimensions

(dia. x length) ..........................................................9.3cm x 30.4-37.1cm (3.6” x 12-14.6”)

Eyepieces       
2x Flip Barlow ................................................................Built in
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”)
Prism ..............................................................................45° roof 
Tripod ..............................................................................Photo style
Battery Life (approx.)

with AutoStar ..........................................................20 hrs.

Compass/Bubble Level included