Celestron 127SLT User Manual

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Celestron 127SLT Specifications

General

Aperture	127 mm (5 ")
Focal Length	1500 mm
Focal Ratio	f/12
Optical Design	Maksutov-Cassegrain
Highest Useful Magnification	300x
Tripod	Steel
Computerized	Yes
Database	40, 000+ objects
Lowest Useful Magnification	18x
Limiting Stellar Magnitude	13
Resolution (Rayleigh)	1.1 arc seconds
Resolution (Dawes)	0.91 arc seconds
Light Gathering Power (Compared to human eye)	329x
Motorized Tracking	Yes
Mount Type	Motorized Altazimuth
Finderscope	StarPointer
Alignment Procedures	SkyAlign, Two-Star Align, Solar System Align
Power Requirements	8 x AA batteries

Summary

Introduction

Warning

Essential safety precautions to prevent eye damage and equipment harm.

Assembly

Assembling the NexStar

Step-by-step guide for connecting the main telescope components.

Powering the NexStar

Instructions for installing batteries or connecting an external power source.

Hand Control

Hand Control Operation

Overview of the hand controller's functions and basic navigation.

Alignment Procedure

Detailed steps for aligning the telescope with celestial objects.

Selecting an Object

Guide on accessing and choosing celestial objects from the database.

Set Up Procedures

Configuration options for tracking, limits, and other telescope settings.

Utility Features

Accessing advanced functions like GPS, factory reset, and hibernate mode.

Telescope Basics

Focusing

Instructions on how to achieve a sharp image of celestial objects.

Calculating Magnification

Formula and examples for determining telescope magnification levels.

General Observing Hints

Tips for optimal viewing conditions and telescope usage.

Celestial Observing

Observing the Planets

Guidance on viewing planets, including tips for detail and contrast.

Observing Deep Sky Objects

Advice for viewing nebulae, clusters, and galaxies in dark skies.

Seeing Conditions

Explanation of transparency, sky illumination, and seeing effects on observation.

Telescope Maintenance

Care and Cleaning of the Optics

Proper methods for cleaning telescope lenses and mirrors.

Collimation

Procedure for aligning the telescope's optical components for optimal performance.

Optional Accessories

Eyepieces

Description of various eyepiece designs and their focal lengths.

Filter, Light Pollution Reduction UHC/LPR

Details on filters to enhance deep sky views in light-polluted areas.

Appendix A - TECHNICAL SPECIFICATIONS

Optical Specification

Technical details on the telescope's optical design and performance metrics.

Appendix B – GLOSSARY OF TERMS

Glossary of Terms

Definitions of astronomical and telescope-related terminology.

Appendix C - RS-232 Connection

RS-232 Connection

Information on connecting the telescope to a computer for control.

Appendix D – MAPS OF TIME ZONES

Maps of Time Zones

Reference map illustrating global time zones for alignment purposes.

January - February Sky

March - April Sky

May - June Sky

July - August Sky

September - October Sky

November - December Sky