Celestron CR-150 HD User Manual

Page 5

Introduction • 5

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.

How to Use This Manual

A Word of Caution!