Celestron 80GTL manual Table of Contents

Page 2

TABLE OF CONTENTS

 

INTRODUCTION

4

Warning

4

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

19

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

2

Image 2
Contents NexStar 80GTL Table of Contents Telescope Maintenance Page NexStar 80GTL Refractor Telescope Assembling the NexStar NexStar 80 GTLErect Image Diagonal Attaching the Telescope to the TripodBalancing the Telescope tube Star Pointer Finderscope FocusingEyepiece Star Pointer Operation Star Pointer InstallationProtective plastic cover over the battery see figure Cleaning and Storage Using your Solar FilterInstallation and Use About the FilterAttaching the Hand Control Outlet Battery PackPowering the NexStar HandNexStar GT Hand Control Auto-Align Alignment ProcedureHand Control Operation Two Star Alignment HelpfulHints Quick-Align NexStar Re-AlignmentSelecting an Object Tour ModeObject Catalog Slewing to an ObjectRate Button Set Up ProceduresDirection Buttons EQ South Alt-AzEQ North OffUtility Features HintPage NexStar Ready Focusing Correct image as viewed when Using erect image diagonalDetermining Field of View General Observing HintsObserving the Planets Observing the MoonLunar Observing Hints Planetary Observing HintsTerrestrial Land Viewing Solar Observing HintsObserving Deep Sky Objects Terrestrial Land Viewing HintsSky Illumination SeeingCare and Cleaning of the Optics Page LPR Filter #94126A Appendix a Technical Specifications Opttiicall SpeciiffiicattiionGlossary of Terms Page Page Appendix C RS-232 Connection Communication ProtocolAppendix D Maps of Time Zones Page Page Page Page Page Page Page Celestron TWO Year Warranty

80GTL specifications

The Celestron 80GTL is a powerful and compact telescope designed for both amateur astronomers and experienced stargazers. It combines modern technology with user-friendly features, making it an excellent choice for those looking to explore the night sky. With its 80mm aperture, the 80GTL captures enough light to reveal a variety of celestial objects, from the moon’s craters to distant galaxies.

One of the standout characteristics of the Celestron 80GTL is its innovative Altazimuth mount. This mount provides smooth and precise movements in both horizontal and vertical directions, allowing users to easily track celestial objects as they move across the sky. The setup is quick and straightforward, making it ideal for beginners who may be intimidated by more complex mounts.

The telescope is equipped with Celestron’s StarScope system, which includes a computer-controlled GoTo mount. This feature allows users to automatically locate and track over 40,000 celestial objects with the push of a button. The included hand controller is intuitive and easy to navigate, giving users instant access to stars, planets, and deep-sky objects. This technology not only enhances the viewing experience but also helps novice astronomers learn about the universe with guided tours through the night sky.

Another notable feature of the Celestron 80GTL is its sturdy construction and lightweight design. Made from high-quality materials, it boasts durability while remaining portable for easy transport. Weighing just under 10 pounds, this telescope can be taken on camping trips or excursions, allowing users to enjoy astronomy in various locations.

Additionally, users will appreciate the 80GTL’s fully coated glass optics which provide excellent image quality and contrast. The included 25mm and 10mm eyepieces offer different magnifications, catering to diverse viewing preferences. Whether observing the rings of Saturn or the detail of lunar landscapes, the 80GTL promises clear and sharp images.

In summary, the Celestron 80GTL is a highly capable telescope, combining an accessible design with advanced technologies. Its user-friendly GoTo mount, quality optics, and lightweight build make it an exceptional option for anyone wishing to delve into the wonders of the cosmos, ensuring both enjoyment and education in the field of astronomy.