Author Topic: Celestron C90 - Is upgrading diagonals(Correct Image and Astronomical) a benefit  (Read 10 times)


  • Active Astronomer
  • ***
  • Posts: 154
  • Activity:
  • Reputation: +0/-0
    • View Profile
Good Morning All,

I received my C90 and am impressed so far with it for Grab and Go Purposes for Land and Sky viewing. I am now wondering if there are any benefits(image quality) to be realized by upgrading to a set of different diagonals for Land and Sky use.

If so, can you recommend some models of diagonals to consider?

Thanks in Advance!