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Celestron CR-150 HD instruction manual Attaching the Telescope to the Mount, The CR-150HD

Models: CR-150 HD

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Attaching the Telescope to the Mount

Attaching the Telescope to the Mount

With the mount fully assembled, you are ready to attach the telescope to the mount.

The optical tube attaches to the mount using a dovetail slidebar that is fastened to two tube rings that clamp around the tube.

•Beforeyouattachtheopticaltube,fullytightentherightascensionanddeclination clamps. Thiswillpreventthetelescopefrommovingsuddenlyonceattachedtothe mount.

1.Loosen the hand knob on the side of the CG-5 mount.

2.Slide the dovetail bar that is attached to the telescope's tube rings onto the mounting platform of the CG-5 mount (see figure 2-8).

3.Tighten the knob on the CG-5 mount to hold the telescope in place.

NOTE: Never loosen any of the knobs on the telescope tube or mount. Also, be sure that the objective lens end of the telescope is pointing away from the ground at all times.

Tube Rings

Dovetail

Bracket

Figure 2-8

This illustration shows the optical tube mounted on the CG-5 mount. The dovetail slide bar has been attached to the telescope tube and is ready to attach to the CG-5 mount.

The CR-150 HD • 15

Image 15

Celestron CR-150 HD instruction manual Attaching the Telescope to the Mount, The CR-150HD, Tube Rings Dovetail Bracket

Contents

Model #21017 The CR-150HD6 Refractor T A B L E O F C O N T E N T S ii Table of ContentsAssembling 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 Refractor Optical System The Mount6 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 placeAttaching the Telescope to the Mount The CR-150HDTube Rings Dovetail Bracket 16 The CR-150HD Balancing the Telescope in R.ABalancing the Telescope in DEC COMPLETELYThe CR-150HD Adjusting the Mount in Altitude Adjusting the Mount in Azimuth18 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 AdapterFocusing Attaching the Finder22 Telescope Basics Telescope Basics Aligning the FinderNEVER POINT YOUR TELESCOPE AT THE SUN UNLESS Image OrientationYourFirstLook DaytimeObservingTelescope Basics • Nighttime ObservingCalculating Magnification Determining Field of View26 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.”A S T R O N O M Y B A S I C S The Celestial Coordi- nate System28 Astronomy Basics Astronomy Basics Motion of the Stars30 Astronomy Basics Polar AlignmentEquator DefinitionFinding the Pole DefinitionAstronomy Basics 32 Astronomy Basics Latitude ScalesAstronomy Basics PointingatPolaris34 Astronomy Basics DeclinationDriftAligning the R.A Setting Circle Polar Alignment FindersAstronomy 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 SOLAROBSERVINGHINTSUsing the Setting Circles Observing Deep-SkyObjects38 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 PhotographyCare and Cleaning of the Optics T E L E S C O P E M A I N T E N A N C ETelescope 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 Celestron International 2835 Columbia Street Torrance, CA Tel FaxItem #21017-INST Price $10.00