User Manual
Advanced 21019 11025/11025-XLT 31061 11045/11045-XLT 11047 11066/11066-XLT
Standard Models C6-R C8-S C8-N C9.25-S C10-N C11-S
Specifications
Optical Design Refractor Schmidt-Cassegrain Reflector Schmidt-Cassegrain Reflector Schmidt-Cassegrain
Aperture 150mm (6") 203mm (8") 200mm (8") 235mm (9.25") 254mm (10") 279mm (11")
Focal Length/Ratio 1200mm F/8 2032mm F/10 1000mm F/5 2350mm F/10 1200mm F/4.7 2800mm F/10
Eyepiece 20mm (60x) 25mm (81x) 20mm (50x) 25mm (94x) 20mm (60x) 40mm (70x)
Finderscope 9x50 6x30 9x50 6x30 9x50 9x50
Mount CG-5 Equatorial CG-5 Equatorial CG-5 Equatorial CG-5 Equatorial CG-5 Equatorial CG-5 Equatorial
Star Diagonal 1.25" 1.25" n/a 1.25" n/a 1.25"
Accessory Tray yes yes yes yes yes yes
Tripod 2" Stainless Steel 2" Stainless Steel 2" Stainless Steel 2" Stainless Steel 2" Stainless Steel 2" Stainless Steel
CD ROM The Sky L1 The Sky L1 The Sky L1 The Sky L1 The Sky L1 The Sky L1
Counterweights 2-11lbs 1-11lbs 2-11lbs 2-11lbs 3-11lbs 3-11lbs
Power (GT versions only) Car Battery Adapter Car Battery Adapter Car Battery Adapter Car Battery Adapter Car Battery Adapter Car Battery Adapter
Fastar Compatible n/a yes n/a n/a n/a n/a
Highest Useful Magnification 354x 480x 480x 555x 600x 660x
Lowest Useful Magnification 21x 29x 29x 34x 36x 40x
Limiting Stellar Magnitude 13.4 14 14 14.4 14.5 14.7
Resolution: Rayleigh .92 arc seconds .68 arc seconds .69 arc seconds .59 arc seconds .54 arc seconds .50 arc seconds
Dawes Limit .77 arc seconds .57 arc seconds .58 arc seconds .49 arc seconds .46 arc seconds .42 arc seconds
Light Gathering Power 459x unaided eye 843x unaided eye 843 unaided eye 1127x unaided eye 1316 unaided eye 1593x unaided eye
Field of View: standard eyepiece .83º .64º 1º .55º .83º .71º
Linear FOV (@1000 yds) 43.8 ft 33.6 ft. 52.5 ft. 29 ft. 43.8 ft. 38 ft.
Optical Coatings Multi-Coated StarBright Coating/XLT Aluminum StarBright Coating/XLT Aluminum StarBright Coating/XLT
Secondary Mirror Obstruction n/a 2.7" 2.2" 3.35" 2.3" 3.75"
by Area n/a 11% 8% 13% 5% 12%
by Diameter n/a 34% 28% 36% 23% 34%
Optical Tube Length 50.5 inches 17 inches 37 inches 22 inches 45 inches 24 inches
Telescope Weight 68 lbs 54.5 lbs 67 lbs 73 lbs 93 lbs 91 lbs
Advanced 21020 11026/11026-XLT 31062 11046/11046-XLT 11048 11067/11067-XLT
Computerized Models C6-R GT C8-S GT C8-N GT C9.25-S GT C10-N GT C11-S GT
Additional Specifications for Computerized Models
Computerized Hand Control Double line 16 character, Double line 16 character, Double line 16 character, Double line 16 character, Double line 16 character, Double line 16 character,
Liquid Crystal Display; Liquid Crystal Display; Liquid Crystal Display; Liquid Crystal Display; Liquid Crystal Display; Liquid Crystal Display;
19 LED backlit buttons 19 LED backlit buttons 19 LED backlit buttons 19 LED backlit buttons 19 LED backlit buttons 19 LED backlit buttons
Max Slew Speed 3º/second 3º/second 3º/second 3º/second 3º/second 3º/second
Software Precision 24bit, 0.08 24bit, 0.08 24bit, 0.08 24bit, 0.08 24bit, 0.08 24bit, 0.08
arcsec calculation arcsec calculation arcsec calculation arcsec calculation arcsec calculation arcsec calculation
Hand Control Ports RS-232 communication RS-232 communication RS-232 communication RS-232 communication RS-232 communication RS-232 communication
port on hand control port on hand control port on hand control port on hand control port on hand control port on hand control
Motor Ports Aux Port, Autoguide Ports Aux Port, Autoguide Ports Aux Port, Autoguide Ports Aux Port, Autoguide Ports Aux Port, Autoguide Ports Aux Port, Autoguide Ports
Tracking Rates Sidereal, Solar and Lunar Sidereal, Solar and Lunar Sidereal, Solar and Lunar Sidereal, Solar and Lunar Sidereal, Solar and Lunar Sidereal, Solar and Lunar
Tracking Modes EQ North & EQ South EQ North & EQ South EQ North & EQ South EQ North & EQ South EQ North & EQ South EQ North & EQ South
Alignment Procedures AutoAlign, 2-Star AutoAlign, 2-Star AutoAlign, 2-Star AutoAlign, 2-Star AutoAlign, 2-Star AutoAlign, 2-Star
Alignment, Quick Align Alignment, Quick Align Alignment, Quick Align Alignment, Quick Align Alignment, Quick Align Alignment, Quick Align
Database 40,000+ objects, 40,000+ objects, 40,000+ objects, 40,000+ objects, 40,000+ objects, 40,000+ objects,
400 user defined 400 user defined 400 user defined 400 user defined 400 user defined 400 user defined
programmable objects programmable objects programmable objects programmable objects programmable objects programmable objects
Enhanced information Enhanced information Enhanced information Enhanced information Enhanced information Enhanced information
on over 200 objects on over 200 objects on over 200 objects on over 200 objects on over 200 objects on over 200 objects
Complete Revised NGC Catalog 7,840 7,840 7,840 7,840 7,840 7,840
Complete Messier Catalog 110 110 110 110 110 110
Complete IC Catalog 5,386 5,386 5,386 5,386 5,386 5,386
Complete Caldwell 109 109 109 109 109 109
Abell Galaxies 2,712 2,712 2,712 2,712 2,712 2,712
Solar System objects 9 9 9 9 9 9
Famous Asterisms 20 20 20 20 20 20
Selected CCD Imaging Objects 25 25 25 25 25 25
Selected SAO Stars 29,500 29,500 29,500 29,500 29,500 29,500
Total Object Database 45,492 45,492 45,492 45,492 45,492 45,492
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ADVANCED SERIES
SPECIFICATIONS
C9-1/4 • Trifid Nebula • Image courtesy of Richard Jacobs
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Specifications are subject to change without notice or obligation.