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The best way to re-collimate is with a good collimation tool. Celestron offers a Newtonian Collimation Tool
(#94183) with detailed instructions that make it an easy chore.
Technical Specifications
C80-HD (#21077) C102-HD
(#21016)
C114-HD
(#31027)
C150-HD
(#31056)
Optical System: Achromat
Refractor
Achromat
Refractor
Newtonian
Reflector
Newtonian
Reflector
Coating: Fully Multi-Coated Fully Multi-
Coated
Multi Coated Multi Coated
Aperture: 80mm 102mm 114mm 150mm
Focal Length: 900mm 1000mm 900mm 1000mm
F/ratio: f/11 f/10 f/8 F/7
Magnification (with standard eyepiece) 45x 50x 45x 50x
Highest Useful Power Magnification: 189x 241x 269x 354x
Resolution in arc seconds (Dawes) 1.45 1.14 1.02 0.77
Light Gathering Power: 131 212 265 459
Limiting Visual Magnitude: 12 12.5 13 13.5
Angular Field of View:
1.1° 1° 1.1° 1°
Linear Field of View (at 1000 yds.) 57’ 53’ 57' 53’
Optical Tube Length: 35" 38.5" 35" 19.25”
Weight
Optical Tube: 6 lbs. 8.0 lbs. 6 lbs. 13 lbs.
Equatorial Mount (with counterweight): 23 lbs. 28 lbs. 28 lbs. 28 lbs.
Note: All specifications are using the standard accessories. These specifications are approximate
and subject to change without notice.
OPTIONAL ACCESSORIES
Celestron International offers a wide assortment of optional accessories to expand your interests.
Sky Maps (#93722) - Invaluable when learning the night sky. They include all the constellations with the
brighter deep-sky objects. On the front cover is a rotating planisphere which indicates when specific
constellations are visible.
Flashlight - LED (#93588) - Uses red LED's to allow reading star maps and locating telescope accessories
and controls without ruining you night vision.