Celestron OMNI XLT 102 manual Astrophotography

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Transparency	33
Sky Illumination	33
Seeing	34
Using the Lens Cap Aperture Stop with Refractor Telescopes	34
ASTROPHOTOGRAPHY	35
Piggyback Photography	35
Short Exposure Prime Focus Photography for Refractors & Newtonians	36
Short Exposure Prime Focus Photography for Schmidt-Cassegrains	36
Eyepiece Projection for a Schmidt-Cassegrain	37
Long Exposure Prime Focus Photography	38
Planetary and Lunar Photography with Special Imagers	39
CCD Imaging for Deep Sky Objects	40
Terrestrial Photography	40
Metering	40
Reducing Vibration	40
TELESCOPE MAINTENANCE	41
Care and Cleaning of the Optics	41
Collimation of Refractors	41
Collimation of a Schmidt-Cassegrain	42
Collimation of a Newtonian	44
OPTIONAL ACCESSORIES	48
APPENDIX A - TECHNICAL SPECIFICATIONS	51
APPENDIX B - GLOSSARY OF TERMS	52
SKY MAPS	55
CELESTRON TWO YEAR WARRANTY	61

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Contents Omni XLT Series Telescopes Table of Contents Astrophotography Page Omni XLT 102 Refractor Omni XLT 150 Newtonian Omni XLT 127 Schmidt-Cassegrain Setting up the Tripod Attaching the Equatorial Mount Attaching the Center Leg Brace Installing the Counterweight BarAttaching the Slow Motion Control Knobs Cables Installing the CounterweightsAttaching the Telescope Tube to the Mount Installing the Visual Back Installing the FinderscopeInstalling the Eyepieces Installing the Star DiagonalBalancing the Mount in R.A Moving the Telescope ManuallyBalancing the Mount in DEC Adjusting the MountAdjusting the Mount in Azimuth Adjusting the Mount in AltitudePage Page Image Orientation FocusingCalculating Magnification Aligning the FinderscopeGeneral Observing Hints Determining Field of ViewCelestial Coordinate System Motion of the Stars Pointing at Polaris Latitude ScaleFinding the North Celestial Pole Polar Alignment with the Latitude Scale Polar Alignment in the Southern HemisphereFinding the South Celestial Pole SCP Pointing at Sigma OctantisDeclination Drift Method of Polar Alignment Aligning the R.A. Setting Circle 11 Vernier Scale Using the R.A. Vernier ScalePlanetary Observing Hints Observing the MoonLunar Observing Hints Observing the PlanetsSeeing Conditions Observing the SunSolar Observing Hints Observing Deep Sky ObjectsSeeing Using the Lens Cap Aperture Stop with Refractor TelescopesPiggyback Photography Using Digital Cameras Full Eyepiece Projection for a Schmidt-CassegrainLong Exposure Prime Focus Photography Planetary and Lunar Photography with Special Imagers Reducing Vibration CCD Imaging for Deep Sky ObjectsTerrestrial Photography MeteringCollimation of Refractors Care and Cleaning of the OpticsTwo 2 turns Collimation of a Schmidt-CassegrainCollimated telescope Should appear Symmetrical with Aligning the Secondary Mirror Collimation of a NewtonianBoth mirrors aligned with your eye looking into the focuser Night Time Star Collimating As a Series 1 # Page Page Appendix a Technical Specifications Appendix B Glossary of Terms Page Page Page Page Page Page Page Page Celestron Two Year Warranty