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Meade(米德)5“ LXD75 AR_5

时间:2008-09-19 07:44:36  来源:Meade  作者:Meade

 

Meade 5" LXD75 AR-5 Achromatic Refracting Telescope

Meade 5" LXD75 AR-5 Achromatic Refracting Telescope provide a new level of sophistication and precision at a moderate price. A revelation of advanced electronic and software design, the exclusive patented Meade Autostar system, included as standard equipment for Meade 5" LXD55 AR-5 Achromatic Refracting Telescope, such advantage permits an amazing range of capabilities never before offered on telescopes in this price and aperture class. Meade 5" LXD55 AR-5 Achromatic Refracting Telescope comes with objective lenses that resolve to the theoretical limits for their apertures, Meade 5" LXD55 refractors present all of the diffraction-limited optical performance obtainable from the classical 2-element achromat design. Deep-space images, in particular, are rich in resolution and contrast, with a minimum of chromatic aberration.

 

Specifications for Meade 5" LXD55 AR-5 Achromatic Refracting Telescope:

  

"Optical Design: Achromatic refractor

 

Clear Aperture: 127mm (5"")

 

Focal Length, Focal Ratio: 1143mm; f/9

 

Resolving Power (arc secs.): 0.9

 

Optical Coatings: multi-coated

 

Ultra-High Transmission Coatings: Upon purchasing

 

Limiting Visual Magnitude (approx.): 12.8

 

Limiting Photographic Magnitude (approx.): 15.3

 

Image Scale (degs./inch): 1.26°/inch

 

Maximum Practical Visual Power: 350x

 

35mm Angular Film Coverage: 1.19° x 1.70°

 

Optical Tube Dimensions (dia. x length): 6.3"" x 41""

 

Counterweights: 1 x 10 lbs.

 

Tube Body: aluminum

 

Mount Castings: aluminum

 

Objective Lens: BK7; F2

 

Total Net Telescope Weight: 49 lbs.

 

Telescope Shipping Weight (approx.): 73 lbs.

 

Field Tripod Height all models: 27"" - 43"", variable

 

Telescope Mounting:  LXD55, German-type

 

Setting Circle Diameters, RA and Dec.: 2.25""

 

Polar Illuminated Viewfinder: included

 

RA Control System: 9-speed, microprocessor-controlled, 12v DC, 72mm (2.83"") worm gear

 

Declination Control System: 9-speed, microprocessor-controlled, 12v DC, 72mm (2.83"") worm gear

 

Hemispheres of Operation: North and South

 

GO TO Pointing Precision (approx.): 15 arc mins.

 

Slow-Motion Controls: electric, both axes

 

Bearings: journal bearings: RA: 1 x 55mm, 1 x 35mm; Dec: 1 x 62mm, 1 x 33mm

 

Autostar Hand Controller: PIC 16C57 microcontroller; 2 line x 16 alphanumeric character display; 20-button keypad, red LED backlit

 

Main Telescope Controller: Motorola 68HC11 microprocessor; 1-Megabyte flash memory (field reprogrammable) 32K RAM

 

Batteries (user-supplied): 8 x D-cells

 

Battery Life (approx.): 40 hours

 

Onboard Celestial Object Database: 30,223 objects

 

Slew Speeds both axes: 1x, 2x, 8x, 16x, 64x, 128x sidereal; 1.5°/sec., 3°/sec., 4.5°/sec.

 

Tracking Rates: sidereal, lunar, or custom-selected from 2000 incremental rates"

 


 

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