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Celestron AstroMaster LT User Manual

Celestron AstroMaster LT
25 pages
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Series Telescopes
INSTRUCTION MANUAL
• AstroMaster
®
LT 60AZ # 21073 • AstroMaster
®
LT 70AZ # 21074
• AstroMaster
®
LT 76AZ # 31036
AstroMaster
®
LT 60AZ
AstroMaster
®
LT 76AZ
®
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Celestron AstroMaster LT Specifications

General IconGeneral
Aperture70 mm
Optical DesignRefractor
Mount TypeAltazimuth
Eyepiece 120 mm
Eyepiece 210 mm
FinderscopeStarPointer
Eyepiece Barrel Size1.25 inches
Weight6.08 kg
TripodPre-assembled tripod with 1.25" steel tube legs

Summary

Introduction to AstroMaster LT Telescopes

Telescope Assembly Guide

Setting Up the Tripod

Step-by-step instructions for assembling the telescope's tripod for a stable base.

Manually Moving the Telescope

How to point and lock the telescope using the pan handle and azimuth lock.

Attaching Telescope Tube to Mount

Procedure for securely mounting the optical tube onto the telescope's alt-azimuth mount.

Installing Diagonal and Eyepieces (Refractor)

Guide for inserting the diagonal and eyepieces into refractor telescope focusers.

Installing Eyepieces on Newtonians

Instructions for attaching eyepieces to the focuser of Newtonian telescopes.

Understanding Telescope Basics

Understanding Image Orientation

Explains how images appear inverted or reversed based on telescope and eyepiece setup.

Focusing the Telescope

How to use the focus knob to achieve a sharp and clear image.

Aligning the Finderscope

Steps to align the finderscope with the main telescope for accurate object acquisition.

Calculating Magnification

Formula to determine telescope magnification based on eyepiece focal length.

Determining Field of View

Method to calculate the angular and linear field of view for observing.

General Observing Hints

Practical tips for improving the observing experience and image quality.

Astronomy Basics for Users

Celestial Coordinate System

Explains the celestial coordinate system (RA and Dec) for locating sky objects.

Understanding Star Motion

Describes how stars appear to move in the sky due to Earth's rotation.

Celestial Observing Guide

Observing the Moon

Guidance for viewing the Moon, including optimal phases and details to observe.

Observing the Planets

Tips for viewing planets, detailing features of major planets like Jupiter and Saturn.

Observing the Sun Safely

Instructions for safe solar observation, emphasizing necessary protective measures.

Observing Deep Sky Objects

Information on viewing celestial objects beyond our solar system.

Star Hopping Technique

A method for navigating the night sky to locate specific deep-sky targets.

Understanding Seeing Conditions

Factors affecting atmospheric stability and their impact on viewing quality.

Astrophotography with Your Telescope

Prime Focus Astrophotography

Introduction to capturing celestial images directly through the telescope.

Planetary and Lunar Photography

Using specialized cameras for improved planetary and lunar image capture.

CCD Imaging for Deep Sky

Overview of CCD cameras for detailed deep-sky object imaging.

Terrestrial Photography

Utilizing the telescope as a telephoto lens for landscape and wildlife photos.

Telescope Maintenance and Care

Care and Cleaning of Optics

Essential procedures for cleaning telescope lenses and mirrors to preserve optical quality.

Collimation of Newtonian Telescopes

Instructions for aligning optical components to optimize image clarity and reduce aberrations.

Aligning the Secondary Mirror

Steps to adjust the secondary mirror for proper optical alignment in Newtonian telescopes.

Aligning the Primary Mirror

Procedure for adjusting the primary mirror to achieve concentric alignment.

Night Time Star Collimation

Fine-tuning telescope collimation using stars for optimal performance.

AstroMaster LT Specifications

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