Celestron C8-S - Manual (Page 49)

49
Appendix A – Technical Specifications
Advanced Series 11071/11072 11025/11026 11045/11046
C5-S C8-S C9.25-S
Specifications:
Optical Design 127mm(5") Schmidt-Cassegrain 203mm (8") Schmidt-Cassegrain 235mm (9.25") Schmidt-Cassegrain
Focal Length 1250mm F/10 2032mm F/10 2350mm F/10
Finderscope 6x30 6x30 6x30
Mount CG-5 Equatorial CG-5 Equatorial CG-5 Equatorial
Eyepiece 25mm Plossl (50x) 25mm Plossl (81x) 25mm Plossl (94x)
Star Diagonal 1.25" 1.25" 1.25"
Accessory tray Yes Yes Yes
Tripod 2" Stainless Steel 2" Stainless Steel 2" Stainless Steel
Technical Specs
Highest Useful Magnication 300x 480x 555x
Lowest Useful Magnification 18x 29x 34x
Limiting Stellar Magnitude 13 14 14.4
Resolution: Rayleigh 1.1arc seconds .68 arc seconds .59 arc seconds
Dawes Limit .91 arc seconds .57 arc seconds .49 arc seconds
Photographic Resolution 200 line/mm 200 line/mm 200 line/mm
Light Gathering Power 329x unaided eye 843x unaided eye 1127x unaided eye
Field of View: standard eyepiece 1º .64º .55º
Linear FOV (@1000 yds) 52.5 ft. 33.6 ft. 29 ft.
Optical Coatings - Standard Starbright Coating Starbright Coating Starbright Coating
Secondary Mirror Obstruction 1.75" 2.7" 3.35"
by Area 12% 11% 13%
by Diameter 35% 34% 36%
Optical tube length 14 inches 17 inches 22 inches
Telescope Weight 48 lbs 54.5 lbs 73 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 arcsec 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