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Celestron 21035 Travel Scope 70 Instruction Manual

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Travel Scope
Travel Scope
Instruction Manual
Instruction Manual
Model # 21035 Travel Scope 70
Model # 21035 Travel Scope 70
Model # 21038 Travel Scope 50
Model # 21038 Travel Scope 50

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Table of Contents

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   Summary of Contents for Celestron 21035 Travel Scope 70

  • Page 1 Travel Scope Travel Scope Instruction Manual Instruction Manual Model # 21035 Travel Scope 70 Model # 21035 Travel Scope 70 Model # 21038 Travel Scope 50 Model # 21038 Travel Scope 50...
  • Page 2: Table Of Contents

    Table of Contents INTRODUCTION ........................3   ASSEMBLY..........................5   Setting up the Tripod.......................5   Attaching the Telescope Optical Tube to the Tripod ..............6   Moving the Travel Scope Manually..................6   Installing the Diagonal & Eyepiece ..................7   Installing the Finderscope – Travel Scope 70 only..............7  ...
  • Page 3: Introduction

    Congratulations on your purchase of a Celestron Travel Scope. The Travel Scope is made of the highest quality materials to ensure stability and durability. All this adds up to a telescope that gives you a lifetime of pleasure with a minimal amount of maintenance.
  • Page 4 Figure 1-1 Travel Scope 70 (Travel Scope 50 similar) Objective Lens Pan Handle – Altitude Motion Telescope Optical Tube Tripod Finderscope Bracket Central Column Locking Knob Erect Image Diagonal Azimuth Locking Knob Eyepiece Tripod Head Platform Focus Knob...
  • Page 5: Assembly

    This section covers the assembly instructions for your Travel Scope. Your telescope should be set up indoor the first time so that it is easy to identify the various parts and familiarize yourself with the correct assembly procedure before attempting it outdoor. The Travel Scope 70 comes in one box.
  • Page 6: Attaching The Telescope Optical Tube To The Tripod

    Attaching the Telescope O pti cal Tube to the Tri pod Attaching the Telescope O pti cal Tube to the Tri pod The telescope optical tube attaches to the tripod by using the mounting bracket on the bottom of the optical tube (Figure 2-7 shows the Travel Scope 70;...
  • Page 7: Installing The Diagonal & Eyepiece

    Installing the Diagonal & Eyepi ece Installing the Diagonal & Eyepi ece The diagonal is a prism that diverts the light at a right angle to the light path of the telescope. This allows you to observe in a position that is more comfortable than if you had to look straight through.
  • Page 8: Telescope Basics

    – you will achieve the power but the image will be dark with low contrast because you have magnified it to the maximum possible. For the brightest images with the highest contrast levels, use lower powers. You can purchase optional eyepieces to give you a range of powers you can observe with. Visit the Celestron website to see what is available.
  • Page 9: Determining Field Of View

    Determi ning Fi eld of View Determi ning Fi eld of View Determining the field of view is important if you want to get an idea of the angular size of the object you are observing. To calculate the actual field of view, divide the apparent field of the eyepiece (supplied by the eyepiece manufacturer) by the magnification.
  • Page 10: Astronomy Basics

    Up to this point, this manual covered the assembly and basic operation of your telescope. However, to understand your telescope more thoroughly, you need to know a little about the night sky. This section deals with observational astronomy in general and includes information on the night sky. The C elestial C oordi nate System The C elestial C oordi nate System To help find objects in the sky, astronomers use a celestial coordinate system that is similar to our geographical co-...
  • Page 11: Motion Of The Stars

    Moti on of the Stars Moti on of the Stars The daily motion of the Sun across the sky is familiar to even the most casual observer. This daily trek is not the Sun moving as early astronomers thought, but the result of the Earth's rotation. The Earth's rotation also causes the stars to do the same, scribing out a large circle as the Earth completes one rotation.
  • Page 12: Celestial Observing

    So, avoid observing the planets when they are low on the horizon or when they are directly over a source of radiating heat, such as a rooftop or chimney. See the "Seeing Conditions" section later in this section. To increase contrast and bring out detail on the planetary surface, try using Celestron eyepiece filters. •...
  • Page 13: Observing Deep-sky Objects

    To center the Sun without looking into the eyepiece, watch the shadow of the telescope tube until it forms a • circular shadow. Observi ng D eep - - Sky O bjects Sky O bjects Observi ng D eep Deep-sky objects are simply those objects outside the boundaries of our solar system. They include star clusters, planetary nebulae, diffuse nebulae, double stars and other galaxies outside our own Milky Way.
  • Page 14 Figure 5-1 Star hopping will take some getting used to and objects that don’t have stars near them that are visible to the naked eye are challenging. One such object is M57 (Figure 5-2), the famed Ring Nebula. Here's how to find it: Find the constellation of Lyra, a small parallelogram visible in the summer and fall months.
  • Page 15: Seeing Conditions

    Seeing Conditi ons Seeing Conditi ons Viewing conditions affect what you can see through your telescope during an observing session. Conditions include transparency, sky illumination, and seeing. Understanding viewing conditions and the effect they have on observing will help you get the most out of your telescope. Transparency Transparency is the clarity of the atmosphere which is affected by clouds, moisture, and other airborne particles.
  • Page 16: Telescope Maintenance

    NOT sealed, the covers should be placed over the openings when not in use. This will prevent contaminants from entering the optical tube. Internal adjustments and cleaning should be done only by the Celestron repair department. If your telescope is in need of internal cleaning, please call the factory for a return authorization number and price quote.
  • Page 17: Technical Specifications

    Model # 21038 Model # 21035 Travel Scope Specifications Travel Scope 50 Travel Scope 70 Refractor Optical Design Refractor 50mm (2.0”) Aperture 70mm (2.8") 360mm Focal Length 400mm f/7.2 Focal Ratio f/5.7 Coated Optical Coatings Fully Coated 2x20 Finderscope 5x24 Erect Image .96”...
  • Page 18 Celestron 2835 Columbia Street Torrance, CA 90503 U.S.A. Tel. (310) 328-9560 Fax. (310) 212-5835 Website: www.celestron.com Copyright 2010 Celestron All rights reserved. (Products or instructions may change without notice or obligation.) Item # 21035-INST Printed in China $10.00 01-10 Rev.3 060909...

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21038 travel scope 50

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