Transparency ............................................................................................................................................ 33
Sky Illumination ....................................................................................................................................... 33
Seeing ....................................................................................................................................................... 34
ASTROPHOTOGRAPHY ........................................................................................................................................... 35
Piggyback Photography............................................................................................................................ 35
Terrestrial Photography ............................................................................................................................ 40
Metering ................................................................................................................................................... 40
Reducing Vibration .................................................................................................................................. 40
TELESCOPE MAINTENANCE ................................................................................................................................. 41
Collimation of Refractors ......................................................................................................................... 41
Collimation of a Newtonian ..................................................................................................................... 44
OPTIONAL ACCESSORIES ...................................................................................................................................... 48
SKY MAPS.................................................................................................................................................................... 55
CELESTRON TWO YEAR WARRANTY ................................................................................................................ 61
3