Optional accessories, Technical specifications – Celestron 31056 User Manual
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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.