Celestron OMNI XLT 102 User Manual

3
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

Celestron OMNI XLT 102 Specifications

General

Type	Refractor
Focal ratio	9.8
Magnification	241 x
Fixed aperture	102 mm
Fixed focal length	1000 mm
Compatible eyepieces	25 mm
Product color	Black, White
Tripod material	Steel

Weight and Dimensions

Length	10003 mm
Weight	4310 g