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B What can I expect to see with a 6inch mirror?

  1. Apr 5, 2016 #1
    I purchased a 6 inch mirror reflector telescope with GPS tracking, and hoping to do some astrophotography.

    I previously had a 3in lens refractor. Will the resolution be twice as good?
     
  2. jcsd
  3. Apr 5, 2016 #2

    mfb

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    Seeing will become (more) relevant, depending on atmospheric conditions. You collect four times the light, but resolution does not have to go up by a factor 2.
     
  4. Apr 5, 2016 #3
    So if it would be 4x the light gathering then the resolution would be 4x right? Assuming conditions/distances of planets are the same.

    Thanks
     
  5. Apr 5, 2016 #4

    mfb

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    No, a factor 2 in resolution (in both axes) at the same light per pixel already needs a factor 4 more light. Without the atmosphere, you could get the same image quality with a 2 times better resolution (4 times the number of pixels). With the atmosphere, you probably won't reach that theoretical improvement.
     
  6. Apr 5, 2016 #5
    Okay makes sense thanks a lot for the help :D
     
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