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Celestron CR-150 HD A S S E M B L I N G Y O U R C R - 1 5 0 H D, Unpacking Your CR-150HD

Models: CR-150 HD

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A S S E M B L I N G Y O U R C R - 1 5 0 H D

A S S E M B L I N G Y O U R C R - 1 5 0 H D

Unpacking Your CR-150 HD

The CR-150 HD (#21017) refracting telescope is offered on a German equatorial mount. The CR-150 HD is shipped in two boxes. The first box includes the optical tube and all of the standard accessories, which include:

•20mm Plossl Ocular 1-1/4"

•Star Diagonal 1-1/4"

•2x Barlow Lens 1-1/4", with built-in Camera Adapter

•9x50mm Finder and Bracket

•Lens Cap with 112mm aperture stop

The second box contains the tripod, equatorial mount and the hardware needed to set it up. Included are the:

•CG-5 German Equatorial Mount

•Counterweight Bar

•Two 5.1Kg (11 lb.) Counterweights

•Declination (DEC) Slow Motion Knob

•Right Ascension (R.A.) Slow Motion Knob

•Adjustable Aluminium Tripod

•Accessory Tray

When setting up the telescope, find a large, clear area where the parts can be laid out without fear of losing them. Start with the tripod and mount. Remove the contents of the box and place them neatly on your work surface. Leave the optical tube in its box until you are ready to attach it to the mount. Once your CR-150 HD has been unpacked and assembled, you will not need the shipping boxes for everyday storage and transportation. However, you should save them in case you decide to ship your telescope via a common carrier.

The CR-150 HD • 7

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Celestron CR-150 HD instruction manual A S S E M B L I N G Y O U R C R - 1 5 0 H D, Unpacking Your CR-150HD

Contents

The CR-150HD Model #210176 Refractor ii Table of Contents T A B L E O F C O N T E N T SAssembling the CG-5Equatorial Mount Table of Contents Using the Lens Cap Aperture Stop4 Introduction I N T R O D U C T I O NIntroduction How to Use This Manual AWordofCautionThe Mount The Refractor Optical System6 Introduction Unpacking Your CR-150HD A S S E M B L I N G Y O U R C R - 1 5 0 H DThe CR-150HD The CR-150HD Setting Up the Tripod Adjusting the Tripod HeightAssembling the CG-5Equatorial Mount Tripod Head10 The CR-150HD Attaching the Accessory TrayThe CR-150HD Attaching the Equatorial Mount12 The CR-150HD Attaching the R.A. Slow Motion KnobThe CR-150HD Attaching the Declination Slow Motion Knob14 The CR-150HD 1.Lock the DEC clamp to hold the mount in placeThe CR-150HD Attaching the Telescope to the MountTube Rings Dovetail Bracket 16 The CR-150HD Balancing the Telescope in R.ACOMPLETELY Balancing the Telescope in DECThe CR-150HD Adjusting the Mount in Azimuth Adjusting the Mount in Altitude18 The CR-150HD OPTICAL TUBE Technical SpecificationsDisassembling and Transporting Your CR 150 HD Storing Your CR- 150 HDThe Eyepiece Attaching the AccessoriesT E L E S C O P E B A S I C S The Star DiagonalBuilt-inT-Adapter 1 1/4 AccessoryFocuser Tension AdapterAttaching the Finder Focusing22 Telescope Basics Telescope Basics Aligning the FinderNEVER POINT YOUR TELESCOPE AT THE SUN UNLESS Image OrientationYourFirstLook DaytimeObservingTelescope Basics • Nighttime ObservingDetermining Field of View Calculating Magnification26 Telescope Basics Telescope Basics GeneralPhotographyHints Your Celestron telescope can be used for both terrestrial and astronomical photography. Your telescope has a fixed aperture and, as a result, a fixed f/ratio. To properly expose your subjects photographically, you need to set your shutter speed accordingly. Most 35mm single lens reflex SLR cameras offer through-the-lens metering that lets you know if your picture is under or overexposed. This is important for terrestrial photography where exposure times are measured in fractions of a second. In astrophotography, the exposures are much longer, requiring that you use the “B” setting on your camera. The actual exposure time is determined by how long you keep the shutter open. More on this in the section on “Celestial Photography.”The Celestial Coordi- nate System A S T R O N O M Y B A S I C S28 Astronomy Basics Astronomy Basics Motion of the Stars30 Astronomy Basics Polar AlignmentEquator DefinitionDefinition Finding the PoleAstronomy Basics 32 Astronomy Basics Latitude ScalesAstronomy Basics PointingatPolaris34 Astronomy Basics DeclinationDriftPolar Alignment Finders Aligning the R.A Setting CircleAstronomy Basics C E L E S T I A L O B S E R V I N G Observing the MoonObserving the PlanetsCelestial Observing Using the Lens Cap Aperture StopObserving the Sun SOLAROBSERVINGHINTSObserving Deep-SkyObjects Using the Setting Circles38 Celestial Observing Celestial Observing StarHopping40 Celestial Observing Seeing Viewing ConditionsTransparency Sky Illumination42 Celestial Observing Celestial Photography C E L E S T I A L P H O T O G R A P H YQuarter Short Exposure Prime FocusLunar Phase CrescentCelestial Photography The exposure times listed here should be used as a starting point. Always make exposures that are longer and shorter than the recommended time. Also, try bracketing your exposures, taking a few photos at each shutter speed. This will ensure that you will get a good photo. If using black and white film, try a yellow filter to reduce the light intensity and to increase contrast46 Celestial Photography PiggybackCelestial Photography Ektar 1000 color print Konica 3200 color print48 Celestial Photography Projection PhotographyT E L E S C O P E M A I N T E N A N C E Care and Cleaning of the OpticsTelescope Maintenance Super Modified Achromatic SMA Eyepieces 50 Optional AccessoriesO P T I O N A L A C C E S S O R I E S Dual Axis Drive System - #93523Optional Accessories Motor Drive System - #93518 52 Optional AccessoriesType THEMESSIERCATALOGNGC# ConstProper Name NGC#Const TypeProper Name NGC#Const TypeConstellation LIST OF BRIGHT STARSEpoch Star NameGeneral Observational Astronomy FOR FURTHER READINGAstronomy Texts AtlasesCELESTRON ONE YEAR WARRANTY Torrance, CA Tel Fax Celestron International 2835 Columbia StreetItem #21017-INST Price $10.00