INSTRUCTION MANUAL NexStar 80GTL - Celestron
INSTRUCTION MANUAL NexStar 80GTL - Celestron
INSTRUCTION MANUAL NexStar 80GTL - Celestron
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
APPENDIX A - TECHNICAL SPECIFICATIONS<br />
OOppt ti iiccaal ll SSppeecci iif fi iiccaat ti iioonn<br />
Design Refractor<br />
Aperture 80mm<br />
Focal Length 900mm<br />
F/ratio of the Optical System F/11<br />
Objective Coatings Fully Coated<br />
Highest Useful Magnification 189x<br />
Lowest Useful Magnification 11x<br />
Resolution: Rayleigh Criterion<br />
1.73 arc seconds<br />
Dawes Limit<br />
1.45 arc seconds<br />
Light Gathering Power 131x unaided eye<br />
Field of View: Standard Eyepiece 1.4º<br />
Linear Field of View (at 1000 yds) 74 feet<br />
Eyepiece Magnification: 36x (25mm)<br />
90x (10mm)<br />
Optical Tube Length 35 inches<br />
Electronic Specifications<br />
Input Voltage<br />
Maximum<br />
Minimum<br />
12 V DC Nominal<br />
18 V DC Max.<br />
8 V DC Min.<br />
Batteries Required 8 AA Alkaline<br />
Power Supply Requirements 12 VDC-750 mA (Tip positive)<br />
Mechanical Specifications<br />
Motor: Type<br />
Resolution<br />
30<br />
<strong>NexStar</strong> <strong>80GTL</strong><br />
DC Servo motors with encoders, both axes<br />
.26 arc sec<br />
Slew speeds Nine slew speeds: 4º /sec, 2º /sec, 1º/sec, .5 /sec, 32x, 16x, 8x, 4x, 2x<br />
Hand Control Double line, 16 character Liquid Crystal Display<br />
19 fiber optic backlit LED buttons<br />
Fork Arm Cast aluminum<br />
Software Specifications<br />
Software Precision 16 bit, 20 arc sec. calculations<br />
Ports RS-232 communication port on hand control<br />
Tracking Rates Sidereal, Solar and Lunar<br />
Tracking Modes Alt-Az, EQ North & EQ South<br />
Alignment Procedures AutoAlign, 2-Star Alignment, Quick-Align<br />
Database 25 user defined programmable object.<br />
Enhanced information on over 100 objects<br />
Total Object Database 4,033 Objects