Loading ...
Sorry, an error occurred while loading the content.

Re: [MeadeUncensored] Starbright XLT vs. UHTC

Expand Messages
  • Mike Ruskai
    In , on 10/29/03 ... [snip] ... 1/16th wave? Good luck finding that. ... The difference between magnitude 14.8 and magnitude 14.0 is
    Message 1 of 2 , Nov 1, 2003
    • 0 Attachment
      In <bnp5nt+vj85@...>, on 10/29/03
      at 07:51 PM, "Serg Kostrov" <sergeykostrov@...> said:

      >A couple of days ago Mike Hegedus initiated discussion about
      >StarBright XLT and UHTC coatings in the "Celestron_AS - Celestron
      [snip]
      >coating?" The supreme issue for me is a telescope's OPTICAL QUALITY. If a
      >telescope has 1/10 or 1/16 wave surface quality I can tolerate, without

      1/16th wave? Good luck finding that.

      >gives around 15% to 30% "more light" to my eye. Even if StartBright XLT is
      >better than UHTC for visual observations there is only 6% improvement.
      >Let's say, in a Meade's telescope with UHTC you can see a star of 14.0th
      >magnitude. It means, that in a Celestron's telescope with StarBright XLT
      >you will be able to see a star of 14.8th magnitude. It's not a big deal
      >for me! Did anybody check this?

      The difference between magnitude 14.8 and magnitude 14.0 is about a 108%
      increase in light gathering.

      An increase of 6% gives a magnitude increase of about 0.06.

      - Mike
    Your message has been successfully submitted and would be delivered to recipients shortly.