Celestron 91525, 11055, 11065 instruction manual Observing the Sun

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Observing the Sun

WARNING:

Although overlooked by many amateur astronomers, solar observation is both rewarding and fun. However, because the Sun is so bright, special precautions must be taken when observing our star so as not to damage your eyes or your telescope.

Never project an image of the Sun through the telescope. Because of the folded optical design, tremendous heat buildup will result inside the optical tube. This can damage the telescope and/or any accessories attached to the telescope.

For safe solar viewing, use a solar filter. These filters reduce the intensity of the Sun’s light, making it safe to view. With these filters you can see sun- spots as they move across the solar disk and faculae, which are bright patches seen near the Sun’s edge. Be sure to cover the lens of the finder or completely remove the finder when observing the Sun. This will ensure that the finder itself is not damaged and that no one looks through it inadvertently.

SOLAR OBSERVING HINTS

The best time for observing the Sun is in the early morning or late after- noon when the air is cooler.

To locate the Sun without a finder, watch the shadow of the optical tele- scope tube until it forms a circular shadow.

To ensure accurate tracking, be sure to select the solar tracking rate.

44 • Celestial Observing

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Contents Page E C e l e s t r o n C M- 11 00/1400 B L E O F C O N T E N T S Iv Table of Contents T R O D U C T I O N How to Use This Manual Word of Caution Schmidt-Cassegrain Optical System S E M B L I N G Y O U R C M 1 1 0 Unpacking Your Celestron CM-1100CM-1100 Setting Up the Tripod Attaching the Center Leg Brace Attaching the Central Column Central Column Electronics Console Center Leg BraceAttaching the Equatorial Mount Installing Counterweight Bar Installing CounterweightAttaching the Optical Tube to the Mount Attaching the Visual Back Installing the Star Diagonal Assembling Your CM-1100 Installing the Finder Installing the Polar Finder Moving the Telescope in R.A. and DEC Adjusting the Mount Balancing the Mount in R.A Balancing the Mount in DEC Assembling Your CM-1100 Technical Specifications Tripod L E S C O P E B a S I C S Image OrientationFocusing General Photography Hints Aligning the Finder Your First Look Daytime ObservingNighttime Observing Calculating Magnification Determining Field of View T R O N O M Y B a S I C S Celestial Coordinate SystemMotion of the Stars Polar Alignment DefinitionFinding the Pole Latitude Scales Pointing at Polaris Polar Axis Finder Declination Drift Aligning the R.A. Setting Circle Setting the DEC Circle Powering Up the Drive I N G T H E D R I V EGuide Speed Periodic Error Correc- tion BC Backlash CorrectionHC/CCD Northern/Southern Hemisphere Operation Hand ControllerDEC Reverse AutoguidingL E S T I a L O B S E R V I N G Observing the MoonObserving the Sun Using Your Setting Circles Observing Deep-Sky ObjectsStar Hopping Celestial Observing Viewing Conditions TransparencySky Illumination Seeing ConditionsCelestial Observing L E S T I a L P H O T O G R a P H Y Lunar Phase ISO Crescent Quarter Short Exposure Prime FocusFull Celestial Photography Piggyback Celestial Photography Eyepiece Projection Planet ISO Moon Mercury Venus Mars Jupiter Saturn Long Exposure Prime Focus Celestial Photography CCD Imaging Fastar Configuration Description of F-numbersImaging at f/7 Imaging at f/11 Medium size to small galaxiesLunar or small planetary nebulae Imaging at f/22 Planetary or LunarCare and Cleaning of the Optics Collimation L E S C O P E M a I N T E N a N C ETelescope Maintenance Telescope Maintenance T I O N a L a C C E S S O R I E S Optional Accessories Optional Accessories Optional Accessories Const Mag Type Proper NameNGC# Spiral Galaxy Epoch Star Name Constellation MagnitudeAstronomy Texts AtlasesGeneral Observational Astronomy Visual ObservationCelestron ONE Year Warranty