T A B L E O F C O N T E N T S | Celestron CR-150 HD specification

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Celestron CR-150 HD T A B L E O F C O N T E N T S, Assembling the CG-5Equatorial Mount, ii Table of Contents

Contents

6 Refractor Model #21017The CR-150HD Assembling the CG-5Equatorial Mount T A B L E O F C O N T E N T Sii Table of Contents Using the Lens Cap Aperture Stop Table of Contents I N T R O D U C T I O N 4 Introduction How to Use This Manual AWordofCaution Introduction 6 Introduction The Refractor Optical SystemThe Mount 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 The CR-150HD Tripod Head Setting Up the Tripod Adjusting the Tripod HeightAssembling the CG-5Equatorial Mount Attaching the Accessory Tray 10 The CR-150HD Attaching the Equatorial Mount Attaching the R.A. Slow Motion Knob 12 The CR-150HD Attaching the Declination Slow Motion Knob 1.Lock the DEC clamp to hold the mount in place 14 The CR-150HD Attaching the Telescope to the Mount Tube Rings Dovetail Bracket Balancing the Telescope in R.A 16 The CR-150HD Balancing the Telescope in DEC COMPLETELY 18 The CR-150HD Adjusting the Mount in AltitudeAdjusting the Mount in Azimuth Storing Your CR- 150 HD Technical SpecificationsDisassembling and Transporting Your CR 150 HD OPTICAL TUBE The Star Diagonal Attaching the AccessoriesT E L E S C O P E B A S I C S The Eyepiece Adapter 1 1/4 AccessoryFocuser Tension Built-inT-Adapter 22 Telescope Basics FocusingAttaching the Finder Aligning the Finder DaytimeObserving Image OrientationYourFirstLook NEVER POINT YOUR TELESCOPE AT THE SUN UNLESS Nighttime Observing 26 Telescope Basics Calculating MagnificationDetermining Field of View 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.” 28 Astronomy Basics A S T R O N O M Y B A S I C SThe Celestial Coordi- nate System Motion of the Stars Astronomy Basics Definition Polar AlignmentEquator 30 Astronomy Basics Finding the Pole Latitude Scales 32 Astronomy Basics PointingatPolaris DeclinationDrift 34 Astronomy Basics Aligning the R.A Setting Circle Polar Alignment Finders Planets Observing the MoonObserving the C E L E S T I A L O B S E R V I N G SOLAROBSERVINGHINTS Using the Lens Cap Aperture StopObserving the Sun Celestial Observing 38 Celestial Observing Using the Setting CirclesObserving Deep-SkyObjects StarHopping 40 Celestial Observing Sky Illumination Viewing ConditionsTransparency Seeing 42 Celestial Observing C E L E S T I A L P H O T O G R A P H Y Celestial Photography Crescent Short Exposure Prime FocusLunar Phase Quarter 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 contrast Piggyback 46 Celestial Photography Ektar 1000 color print Konica 3200 color print Projection Photography 48 Celestial Photography Telescope Maintenance Care and Cleaning of the OpticsT E L E S C O P E M A I N T E N A N C E Dual Axis Drive System - #93523 50 Optional AccessoriesO P T I O N A L A C C E S S O R I E S Super Modified Achromatic SMA Eyepieces Optional Accessories 52 Optional Accessories Motor Drive System - #93518 Const THEMESSIERCATALOGNGC# Type 54 The Messier Catalog Type Star Name LIST OF BRIGHT STARSEpoch Constellation Atlases FOR FURTHER READINGAstronomy Texts General Observational Astronomy CELESTRON ONE YEAR WARRANTY Item #21017-INST Price $10.00 Celestron International 2835 Columbia StreetTorrance, CA Tel Fax