Its all about the relation of aperture to focal length. – Off Topic – HabitableZone

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Off Topic » in reply to Is your telescope sagging?

Its all about the relation of aperture to focal length.

hank — 10/17/2017 3:19:02 AM (archived)

You know, the f-ratio.

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The whole thread (12 posts)

New Male Potency Formula Makes The Little Blue Pill Obsolete - hank - 10/16/2017 5:42:18 PM
- Hard copy... - mcfly - 11/4/2017 11:02:49 AM
  - We are not technologically oriented. We just think we are. - hank - 11/4/2017 3:41:15 PM
    - An insightful post, hank! - mcfly - 11/4/2017 4:05:20 PM
  - That isn't surprising... - RL - 11/4/2017 2:54:43 PM
    - "If your archeological find lasts more than 4 hours..." - mcfly - 11/4/2017 3:58:53 PM
      - LOL - RL - 11/4/2017 4:13:45 PM
    - Now, THAT is funny. - hank - 11/4/2017 3:43:35 PM
- Re: New Male Potency Formula Makes The Little Blue Pill Obsolete - podrock - 10/17/2017 2:29:37 AM
- Is your telescope sagging? - RL - 10/17/2017 2:14:13 AM
  - Its all about the relation of aperture to focal length. - hank - 10/17/2017 3:19:02 AM
- Bumper Sticker - hank - 10/16/2017 6:02:01 PM

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HabitableZone — be civil, or at least entertaining. Masthead: Earth photographed from the International Space Station (NASA); the spire in the Eagle Nebula (NASA, ESA and The Hubble Heritage Team, STScI/AURA).