How to Use This Manual AWordofCaution | Celestron CR-150 HD manual

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Celestron CR-150 HD instruction manual How to Use This Manual AWordofCaution, Introduction

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 Table of Contents Using the Lens Cap Aperture Stop 4 Introduction I N T R O D U C T I O N Introduction How to Use This Manual AWordofCaution 6 Introduction The Refractor Optical SystemThe Mount Unpacking Your CR-150HD A S S E M B L I N G Y O U R C R - 1 5 0 H D The CR-150HD Tripod Head Setting Up the Tripod Adjusting the Tripod HeightAssembling the CG-5Equatorial Mount 10 The CR-150HD Attaching the Accessory Tray Attaching the Equatorial Mount 12 The CR-150HD Attaching the R.A. Slow Motion Knob Attaching the Declination Slow Motion Knob 14 The CR-150HD 1.Lock the DEC clamp to hold the mount in place Tube Rings Dovetail Bracket Attaching the Telescope to the Mount 16 The CR-150HD Balancing the Telescope in R.A COMPLETELY Balancing the Telescope in DEC 18 The CR-150HD Adjusting the Mount in AltitudeAdjusting the Mount in Azimuth Disassembling and Transporting Your CR 150 HD Technical SpecificationsStoring Your CR- 150 HD OPTICAL TUBE T E L E S C O P E B A S I C S Attaching the AccessoriesThe Star Diagonal The Eyepiece Focuser Tension 1 1/4 AccessoryAdapter Built-inT-Adapter 22 Telescope Basics FocusingAttaching the Finder Aligning the Finder YourFirstLook Image OrientationDaytimeObserving 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 Astronomy Basics Motion of the Stars Equator Polar AlignmentDefinition 30 Astronomy Basics Finding the Pole 32 Astronomy Basics Latitude Scales PointingatPolaris 34 Astronomy Basics DeclinationDrift Polar Alignment Finders Aligning the R.A Setting Circle Observing the Observing the MoonPlanets C E L E S T I A L O B S E R V I N G Observing the Sun Using the Lens Cap Aperture StopSOLAROBSERVINGHINTS Celestial Observing 38 Celestial Observing Using the Setting CirclesObserving Deep-SkyObjects StarHopping 40 Celestial Observing Transparency Viewing ConditionsSky Illumination Seeing 42 Celestial Observing Celestial Photography C E L E S T I A L P H O T O G R A P H Y Lunar Phase Short Exposure Prime FocusCrescent 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 46 Celestial Photography Piggyback Ektar 1000 color print Konica 3200 color print 48 Celestial Photography Projection 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 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 Eyepieces Optional Accessories Motor Drive System - #93518 52 Optional Accessories NGC# THEMESSIERCATALOGConst Type 54 The Messier Catalog Const Epoch LIST OF BRIGHT STARSStar Name Constellation Astronomy Texts FOR FURTHER READINGAtlases General Observational Astronomy CELESTRON ONE YEAR WARRANTY Item #21017-INST Price $10.00 Celestron International 2835 Columbia StreetTorrance, CA Tel Fax