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Celestron CR-150 HD instruction manual Model #21017, The CR-150HD, Refractor

Models: CR-150 HD

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The CR-150 HD

6" Refractor

Model #21017

INSTRUCTION MANUAL

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$Celestron CR-150 HD instruction manual Model #21017, The CR-150HD, Refractor$

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 Assembling the CG-5Equatorial Mount Setting Up the Tripod Adjusting the Tripod HeightTripod Head The CR-150HD10 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 Disassembling and Transporting Your CR 150 HD Technical SpecificationsStoring Your CR- 150 HD OPTICAL TUBET E L E S C O P E B A S I C S Attaching the AccessoriesThe Star Diagonal The EyepieceFocuser Tension 1 1/4 AccessoryAdapter Built-inT-AdapterAttaching the Finder Focusing22 Telescope Basics Telescope Basics Aligning the FinderYourFirstLook Image OrientationDaytimeObserving NEVER POINT YOUR TELESCOPE AT THE SUN UNLESSTelescope 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 StarsEquator Polar AlignmentDefinition 30 Astronomy BasicsDefinition Finding the PoleAstronomy Basics 32 Astronomy Basics Latitude ScalesAstronomy Basics PointingatPolaris34 Astronomy Basics DeclinationDriftPolar Alignment Finders Aligning the R.A Setting CircleAstronomy Basics Observing the Observing the MoonPlanets C E L E S T I A L O B S E R V I N GObserving the Sun Using the Lens Cap Aperture StopSOLAROBSERVINGHINTS Celestial ObservingObserving Deep-SkyObjects Using the Setting Circles38 Celestial Observing Celestial Observing StarHopping40 Celestial Observing Transparency Viewing ConditionsSky Illumination Seeing42 Celestial Observing Celestial Photography C E L E S T I A L P H O T O G R A P H YLunar Phase Short Exposure Prime FocusCrescent QuarterCelestial 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 O P T I O N A L A C C E S S O R I E S 50 Optional AccessoriesDual Axis Drive System - #93523 Super Modified Achromatic SMA EyepiecesOptional Accessories Motor Drive System - #93518 52 Optional AccessoriesNGC# THEMESSIERCATALOGConst TypeConst NGC#Type Proper NameConst NGC#Type Proper NameEpoch LIST OF BRIGHT STARSStar Name ConstellationAstronomy Texts FOR FURTHER READINGAtlases General Observational AstronomyCELESTRON ONE YEAR WARRANTY Torrance, CA Tel Fax Celestron International 2835 Columbia StreetItem #21017-INST Price $10.00