Celestron 80GTL Telescope User Manual


 
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INTRODUCTION.............................................................................................................................................................4
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ASSEMBLY.......................................................................................................................................................................5
Assembling the NexStar..................................................................................................................................................6
Attaching the Telescope to the Tripod.........................................................................................................................7
Balancing the Telescope tube......................................................................................................................................7
The Erect Image Diagonal...........................................................................................................................................7
The Eyepiece...............................................................................................................................................................8
Focusing......................................................................................................................................................................8
The Star Pointer Finderscope ......................................................................................................................................8
Star Pointer Installation...........................................................................................................................................9
Star Pointer Operationn...........................................................................................................................................9
Using your Solar Filter..............................................................................................................................................10
HAND CONTROL..........................................................................................................................................................11
Attaching the Hand Control.......................................................................................................................................11
Powering the NexStar................................................................................................................................................11
The Hand Control......................................................................................................................................................11
Hand Control Operation ................................................................................................................................................13
Alignment Procedure.................................................................................................................................................13
Auto-Align ................................................................................................................................................................13
Two Star Alignment ..................................................................................................................................................14
Quick-Align...............................................................................................................................................................15
NexStar Re-Alignment..............................................................................................................................................15
Object Catalog...............................................................................................................................................................16
Selecting an Object....................................................................................................................................................16
Slewing to an Object .................................................................................................................................................16
Tour Mode.................................................................................................................................................................16
Direction Buttons ..........................................................................................................................................................17
Rate Button................................................................................................................................................................17
Set Up Procedures.........................................................................................................................................................17
Tracking Mode..........................................................................................................................................................17
Tracking Rate............................................................................................................................................................18
View Time-Site .....................................................................................................................................................18
Sidereal Time ........................................................................................................................................................18
Filter Limits...........................................................................................................................................................18
RS-232...................................................................................................................................................................18
User Defined Objects ............................................................................................................................................18
Get RA/DEC .............................................................................................................................................................19
Get Alt-Az.................................................................................................................................................................19
Goto R.A/Dec............................................................................................................................................................19
Goto Alt-Az...............................................................................................................................................................19
Utility Features..............................................................................................................................................................19
Setup Time-Site................................................................................................................
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Anti-backlash ........................................................................................................................................................19
Slew Limits ...........................................................................................................................................................20
Direction Buttons ..................................................................................................................................................20
Light Control.........................................................................................................................................................20
Select Model..........................................................................................................................................................20
TELESCOPE BASICS....................................................................................................................................................22
Focusing....................................................................................................................................................................22
Image Orientation......................................................................................................................................................22
Calculating Magnification.........................................................................................................................................22
Determining Field of View........................................................................................................................................23
General Observing Hints...........................................................................................................................................23
CELESTIAL OBSERVING ...........................................................................................................................................24
Observing the Moon..............................................................................................................................................24
Lunar Observing Hints ..........................................................................................................................................24
Observing the Planets............................................................................................................................................24
Planetary Observing Hints.....................................................................................................................................24