Celestron NexStar 5 - Appendix A: Technical Specifications; Optical Specifications; Electronic Specifications; Mechanical and Software Specs

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Design Schmidt-Cassegrain Catadioptric
Aperture 5 inches (127mm)
Focal Length 50 inches (1250mm)
F/ratio of the Optical System 10
Primary Mirror: Material
Coatings
Fine Annealed Pyrex
Starbright Coatings - 5 step multilayer process
Secondary Mirror: Material
Coatings
Hand Figured Fine Annealed Pyrex
Starbright Coatings - 5 step multilayer process
Central Obstruction 2” (16% by area)
Corrector Plate: Material
Coatings
Optical Quality Glass
A-R Coatings both sides
Highest Useful Magnification 300x ( ~ 4mm eyepiece)
Lowest Useful Magnification (7mm exit pupil) 23x ( ~ 54mm eyepiece)
( ~ 34mm eyepiece with optional Reducer/Corrector)
Resolution: Rayleigh Criterion
Dawes Limit
1.09 arc seconds
.91arc seconds
Photographic Resolution 182 lines/mm
Light Gathering Power 330x unaided eye
Near Focus standard eyepiece or camera ~ 20 feet
Field of View: Standard Eyepiece
: 35mm Camera
1.04º
1.6º x 1.1º (2.5º x 1.75º) - with optional Reducer/Corrector)
Linear Field of View (at 1000 yds) 55 feet
Magnification: Standard Eyepiece
: Camera
50x
25x
Optical Tube Length 11 inches
Weight of Telescope 17.6 Lbs.
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Input Voltage
Maximum
Minimum
12 V DC Nominal
18 V DC Max.
8 V DC Min.
Batteries Required 8 AA Alkaline
Power Supply Requirements 12 VDC-750 mA (Tip positive)
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Motor: Type
Resolution
DC Servo motors with encoders, both axes
.26 arc sec
Slew speeds Nine slew speeds: 6.5º /sec, 3º /sec, 1.5º/sec, 128x, 64x, 16x, 8x, 2x, 1x
Hand Control Double line, 16 character Liquid Crystal Display
19 fiber optic backlit LED buttons
Fork Arm Cast aluminum, with integrated hand control receptacle
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Software Precision 16 bit, 20 arc sec. calculations
Ports RS-232 communication port on hand control
Tracking Rates Sidereal, Solar, Lunar and King
Tracking Modes Alt-Az, EQ North & EQ South
Alignment Procedures 2-Star Alignment, AutoAlign
Database 25 user defined programmable object.
Enhanced information on over 100 objects
Complete Revised NGC Catalog 7,840
Complete Messier Catalog 110
Complete Caldwell 109
Solar System objects 9
Famous Asterisms 20
Selected SAO Star 10,385
Total Object Database 18,473