Celestron CR-150 HD instruction manual How to Use This Manual AWordofCaution, Introduction

Models: CR-150 HD

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How to Use This Manual

How to Use This Manual

AWordofCaution!

This manual is designed to instruct you in the proper use of your Celestron refracting telescope. This includes assembly, initial use, and long term operation and maintenance. There are four major sections to the manual. The first section covers the proper procedure for setting up your Celestron refracting telescope.

The second section covers basic operations that are common to all telescopes. This includes attaching the accessories, focusing, aligning the finderscope, and taking your first look.

The third section deals with the basics of astronomy and using your telescope for astronomical viewing. This includes polar alignment, aligning the setting circles and using your Celestron for astronomical observations, both visual and photographic. The last major section is on telescope maintenance, specifically on care and cleaning.

In addition to the major sections listed above, there is a list of optional accessories for all models of Celestron refractors. This includes a brief description of the accessory and its purpose.

Finally, there is a list of celestial objects visible through your Celestron telescope. Included are the coordinates for each object, its brightness and a code which indicates object type. In addition, there is a list of bright stars that can be used for aligning the setting circles on the CG-5 equatorial mount.

You should keep your refractor manual handy until you have fully mastered your telescope’s operation.

Your Celestron refractor is designed to give you hours of fun and rewarding observa- tions. However, there are a few things to consider before using your telescope that will ensure your safety and protect your eyes and your equipment.

WARNING ! NEVER LOOK DIRECTLY AT THE SUN WITH THE NAKED EYE OR WITH A TELESCOPE. PERMANENT AND IRREVERSIBLE EYE DAMAGE MAY RESULT.

NEVER USE YOUR TELESCOPE TO PROJECT AN IMAGE OF THE SUN ONTO ANY SURFACE. INTERNAL HEAT BUILD-UP CAN DAMAGE THE TELESCOPE AND/OR ANY ACCESSORIES ATTACHED TO IT.

NEVER USE AN EYEPIECE SOLAR FILTER OR A HERSCHEL WEDGE. INTERNAL HEAT BUILD-UP INSIDE THE TELESCOPE CAN CAUSE THESE DEVICES TO CRACK OR BREAK, ALLOWING UNFILTERED SUNLIGHT TO PASS THROUGH TO THE EYE.

NEVER LEAVE THE TELESCOPE UNSUPERVISED, EITHER WHEN CHIL- DREN ARE PRESENT OR ADULTS WHO MAY NOT BE FAMILIAR WITH THE CORRECT OPERATING PROCEDURES OF YOUR TELESCOPE.

NEVER POINT YOUR TELESCOPE AT THE SUN UNLESS YOU HAVE THE PROPER SOLAR FILTER. WHEN USING YOUR TELESCOPE WITH THE CORRECT SOLAR FILTER, ALWAYS COVER THE FINDER. ALTHOUGH SMALL IN APERTURE, THIS INSTRUMENT HAS ENOUGH LIGHT GATH- ERING POWER TO CAUSE PERMANENT AND IRREVERSIBLE EYE DAMAGE. IN ADDITION, THE IMAGE PROJECTED BY THE FINDER IS HOT ENOUGH TO BURN SKIN OR CLOTHING.

Introduction • 5

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Celestron CR-150 HD instruction manual How to Use This Manual AWordofCaution, Introduction