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  Table:  C8 Telescope Magnification and Field of View
  Primary diameter = 8 inches = 20.32 cm
  Primary effective focal length = 80 inches = 2.032 m
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     Eyepiece   Magnification    Approximate 
   focal length     (X)       field of view (FOV)
      (mm)                      (arcminutes = ') 
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       40           50.8            40
       25           80.3            30
       18          112.9            20
       12.5        162.6            14
        9          225.8            10
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