Appendix A - Technical Specifications - Celestron NexStar 8 Instruction Manual

A p p e n d i x A - T e
A p p e n d i x A - T e
Optical Specification
Design
Aperture
Focal Length
F/ratio of the Optical System
Primary Mirror: Material
Coatings
Secondary Mirror: Material
Coatings
Central Obstruction
Corrector Plate: Material
Coatings
Highest Useful Magnification
Lowest Useful Magnification (7mm exit pupil)
Resolution: Rayleigh Criterion
Dawes Limit
Photographic Resolution
Light Gathering Power
Near Focus standard eyepiece or camera
Field of View: Standard Eyepiece
: 35mm Camera
Linear Field of View (at 1000 yds)
Magnification: Standard Eyepiece
: Camera
Optical Tube Length
Weight of Telescope
Electronic Specifications
Input Voltage
Maximum
Minimum
Batteries Required
Power Supply Requirements
Mechanical Specifications
Motor: Type
Resolution
Slew speeds
Hand Control
Fork Arm
Software Specifications
Software Precision
Ports
Tracking Rates
Tracking Modes
Alignment Procedures
Database
Complete Revised NGC Catalog
Complete Messier Catalog
Complete Caldwell
Solar System objects
Famous Asterisms
Selected SAO Stars
Total Object Database
c h n i c a l S p e c i f i c
c h n i c a l S p e c i f i c
a t i o n s
a t i o n s
Schmidt-Cassegrain Catadioptric
8 inches (203.2mm)
80 inches (2032mm)
10
Fine Annealed Pyrex
Starbright Coatings - 5 step multilayer process
Hand Figured Fine Annealed Pyrex
Starbright Coatings - 5 step multilayer process
2.75"
Optical Quality Crown Glass
A-R Coatings both sides
480x ( ~ 4mm eyepiece)
29x ( ~ 70mm eyepiece)
( ~ 44mm eyepiece with optional Reducer Corrector)
.68 arc seconds
.57arc seconds
182 lines/mm
843x unaided eye
~ 25 feet
.92º
1.0º x .68º (1.6º x 1.07º - with optional Reducer Corrector)
54 feet
50x
25x
16 inches
24 Lbs.
12 V DC Nominal
18 V DC Max.
8 V DC Min.
8 AA Alkaline
12 VDC-750 mA (Tip positive)
DC Servo motors with encoders, both axes
.26 arc sec
Nine slew speeds: 6.5º /sec, 3º /sec, 1.5º/sec, 128x, 64x, 16x, 8x, 2x, 1x
Double line, 16 character Liquid Crystal Display
19 fiber optic backlit LED buttons
Cast aluminum, with integrated hand control receptacle
16 bit, 20 arc sec. calculations
RS-232 communication port on hand control
Sidereal, Solar, Lunar and King
Alt-Az, EQ North & EQ South
2-Star Alignment, AutoAlign
18,000+ objects
25 user defined programmable objects.
9 user defined programmable longitudes and latitudes.
Enhanced information on over 100 objects
7,840
110
109
9
20
10,385
18,473
42