Celestron 11065, 91525, 11055 instruction manual L E S C O P E B a S I C S, Image Orientation

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T E L E S C O P E B A S I C S

Image Orientation

Once your telescope is fully assembled, you are ready for your first look. This section deals with some of the basics of telescope operation.

The image orientation changes depending on how the eyepiece is inserted into the telescope. When using the star diagonal, the image is right-side-up, but reversed from left-to-right (i.e., reverted). If inserting the eyepiece directly into the visual back (i.e., without the star diagonal), the image is upside-down and reversed from left-to-right (i.e., inverted). This is normal for the Schmidt- Cassegrain design and applies to the telescope’s finder as well.

Figure 3-1

These simplified drawings of the planet Jupiter illustrate the different image orienta- tions obtained when using various viewing configurations.

22 • Telescope Basics

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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 Sky Illumination Viewing ConditionsTransparency Seeing ConditionsCelestial Observing L E S T I a L P H O T O G R a P H Y Full Lunar Phase ISO Crescent QuarterShort Exposure Prime Focus 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-numbersLunar or small planetary nebulae Imaging at f/7 Imaging at f/11Medium size to small galaxies 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 MagnitudeGeneral Observational Astronomy Astronomy TextsAtlases Visual ObservationCelestron ONE Year Warranty