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Astromony 101

Celestron 127 Powerseeker:
Aperture: 127 mm (5 in)
Apparent Field of View: 0.8 "F
Focal Ratio: 7.87
Highest Useful Magnification: 300 x
Light Gathering Power (Comp...329 x
Limiting Stellar Magnitude: 13
Lowest Useful Magnification18 x
Mount Type: German Equatorial
Optical Coatings Aluminum
Optical Design Newtonian Reflector.
Optical Tube Length: 20 in (508 mm)
Resolution (Dawes)0.91 arc seconds
Resolution (Rayleigh)1.1 arc seconds
Secondary Mirror Obstructio...10%
Secondary Mirror Obstruction1.6 in (41 mm)
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