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Appendix A – Technical Specifications
Advanced Series 21021 / 21022 21026 / 21027
Specifications:
Optical Design
80mm (3.2") refractor 100mm (4") refractor
Focal Length
600mm F/7.5 900mm F/9
Finderscope
6x30 9x50
Mount
CG-5 Equatorial CG-5 Equatorial
Eyepiece
20mm – 1.25" (30x) 20mm – 1.25" (45x)
Accessory tray
Yes Yes
Tripod
2" Stainless Steel 2" Stainless Steel
Technical Specs
Highest Useful Magnification
189x 236x
Lowest Useful Magnification
11x 14x
Limiting Stellar Magnitude
12 12.5
Resolution: Rayleigh
1.73 arc seconds 1.38 arc seconds
Dawes Limit
1.45 arc seconds 1.16 arc seconds
Light Gathering Power
131x unaided eye 204x unaided eye
Field of View: standard eyepiece
1.67º 1.3º
Linear FOV (@1000 yds)
87.5 ft 70 ft
Optical Coatings - Standard
Fully Multi-Coated Fully Multi-Coated
Optical tube length
23" 34"
Telescope Weight
42 lbs 50 lbs
Advanced GT
Additional Specifications
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
Software Precision 24bit, 0.08 arc sec calculation
Hand Control Ports RS-232 communication port on hand control
Motor Ports Aux Port, Autoguide Ports
Tracking Rates Sidereal, Solar and Lunar
Tracking Modes EQ North & EQ South
Alignment Procedures AutoAlign, 3-Star Alignment, Quick Align, Last Align
Database
40,000+ objects, 400 user defined programmable objects.
Enhanced information on over 200 objects
Complete Revised NGC Catalog 7,840
Complete Messier Catalog 110
Complete IC Catalog 5,386
Complete Caldwell 109
Abell Galaxies 2,712
Solar System objects 9
Famous Asterisms 20
Selected CCD Imaging Objects 25
Selected SAO Stars 29,500
Total Object Database 45,492