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Appendix A - Technical Specifications
Optical Specification CPC 800 - #11073 CPC 925 - #11074 CPC 1100 - #11075
Design Schmidt-Cassegrain Catadioptric Schmidt-Cassegrain Catadioptric Schmidt-Cassegrain Catadioptric
Aperture 8" (203.2mm) 9.25" (235mm) 11" (279mm)
Focal Length 2032mm 2350mm 2800mm
F/ratio of the Optical System 10 10 10
Primary Mirror: Material
Coatings
Fine Annealed Pyrex
Starbright Coatings - 5 step multi-
layer process
Optional:Starbright XLT Coating
Fine Annealed Pyrex
Starbright Coatings - 5 step multi-
layer process
Optional:Starbright XLT Coating
Fine Annealed Pyrex
Starbright Coatings - 5 step multi-
layer process
Optional:Starbright XLT Coating
Central Obstruction 2.5" 3..35" 3.75"
Corrector Plate: Material
Coatings
Optical Quality Crown Glass
A-R Coatings both sides
Optical Quality Crown Glass
A-R Coatings both sides
Optical Quality Crown Glass
A-R Coatings both sides
Highest Useful Magnification 480x (~4mm eyepiece) 555x (~4mm eyepiece) 660x (~4mm eyepiece)
Lowest Useful Magnification
(7mm exit pupil)
29x (~70mm eyepiece) 34x (~70mm eyepiece) 40x (~70mm eyepiece)
Magnification: Standard Eyepiece (40mm Pl) 51x 59x 70x
Resolution: Rayleigh Criterion
Dawes Limit
.68 arc seconds
.57 arc seconds
.59 arc seconds
.49 arc seconds
.50 arc seconds
.42 arc seconds
Light Gathering Power 843x 1127x 1593x
Near Focus w/ standard eyepiece or camera ~25 feet ~40 feet ~60 feet
Field of View: Standard Eyepiece
: 35mm Camera
.9º
1º x .68º
.78º
.9º x .6º
.65º
.72º x .50º
Linear Field of View (at 1000 yds) 47 ft. 41 ft. 34.5 ft.
Optical Tube Length 17" 22" 23"
Weight of Telescope 42 lbs 58 lbs 65 lbs
Weight of Tripod 19 lbs 19 lbs 19 lbs
Electronic Specifications
Input Voltage
Maximum
Minimum
12 V DC Nominal
15 V DC Max.
9 V DC Min.
Power Supply Requirements 12 VDC-1.5A (Tip positive)
GPS Internal 16 channel
Mechanical Specifications
Motor: Type
Resolution
DC Servo motors with encoders, both axes
.1406 arc sec
Slew speeds Nine slew speeds: 3º /sec, 2º /sec, .5º/sec, 64x, 16x, 8x, 4x, 1x, .5x
Hand Control
Double line, 16 character Liquid Crystal Display
19 fiber optic backlit LED keypad
Fork Arm Dual Fork tine cast aluminum with detachable HC holder
Gears 5.625", precision aluminum gears on both axes, 180 tooth. Brass worm gear
Bearings 9.8" Azimuth Bearing
Optical Tube Aluminum
Software Specifications
Software Precision 24 bit, .08 arc sec. calculations
Ports RS-232 communication port on hand control, Autoguider Port, 2 Auxiliary Port
Period Error Correction Permanently programmable
Tracking Rates Sidereal, Solar, Lunar
Tracking Modes Alt-Az, EQ North & EQ South
Alignment Procedures Sky Align, Auto Two-Star Align, Two-Star Align, Solar System Align, EQ North
Align & EQ South Align
Database 40,000+ objects, 99 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