Appendix A – Technical Specifications
Advanced Series | 21021 / 21022 |
| 21026 / 21027 |
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Specifications: |
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Optical Design | 80mm (3.2") refractor |
| 100mm (4") refractor |
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Focal Length | 600mm F/7.5 |
| 900mm F/9 |
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Finderscope |
| 6x30 |
| 9x50 |
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Mount |
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Eyepiece | 20mm – 1.25" (30x) |
| 20mm – 1.25" (45x) |
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Accessory tray |
| Yes |
| Yes |
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Tripod | 2" Stainless Steel |
| 2" Stainless Steel |
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Technical Specs |
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Highest Useful Magnification |
| 189x |
| 236x |
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Lowest Useful Magnification |
| 11x |
| 14x |
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Limiting Stellar Magnitude | 12 |
| 12.5 |
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Resolution: Rayleigh | 1.73 arc seconds |
| 1.38 arc seconds |
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Dawes Limit | 1.45 arc seconds |
| 1.16 arc seconds |
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Light Gathering Power | 131x unaided eye |
| 204x unaided eye |
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Field of View: standard eyepiece | 1.67º |
| 1.3º |
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Linear FOV (@1000 yds) |
| 87.5 ft |
| 70 ft |
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Optical Coatings - Standard | Fully |
| Fully |
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Optical tube length | 23" |
| 34" |
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Telescope Weight |
| 42 lbs |
| 50 lbs |
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Advanced GT |
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Additional Specifications |
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Hand Control |
| Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons | |||
Motor: Type |
| DC Servo motors with encoders, both axes | |||
Max Slew Speed |
| 3º/second |
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Software Precision |
| 24bit, 0.08 arc sec calculation | |||
Hand Control Ports |
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Motor Ports |
| Aux Port, Autoguide Ports | |||
Tracking Rates |
| Sidereal, Solar and | Lunar | ||
Tracking Modes |
| EQ North & EQ South | |||
Alignment Procedures |
| AutoAlign, | |||
Database |
| 40,000+ objects, 400 user defined programmable objects. | |||
| Enhanced information on over 200 objects | ||||
Complete Revised NGC Catalog |
| 7,840 |
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Complete Messier Catalog |
| 110 |
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Complete IC Catalog |
| 5,386 |
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Complete Caldwell |
| 109 |
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Abell Galaxies |
| 2,712 |
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Solar System objects |
| 9 |
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Famous Asterisms |
| 20 |
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Selected CCD Imaging Objects |
| 25 |
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Selected SAO Stars |
| 29,500 |
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Total Object Database |
| 45,492 |
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