General Optics

Discussion of optical systems and their characteristics.
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  • 10 Inch Dob Under Bortle 4 Skies Vs. 6 Inch Refractor Under Bortle 2 Skies
    by Refractordude »
    10 Replies
    5159 Views
    Last post by Ylem United States of America
  • 127mm Lens
    by LDW47 Canada »
    7 Replies
    3787 Views
    Last post by LDW47 Canada
  • Collimation tools for faster scopes?
    by turboscrew »
    22 Replies
    11747 Views
    Last post by Don Pensack United States of America
  • How to Calculate the Limits of Your Telescope
    by mikemarotta »
    8 Replies
    4791 Views
    Last post by Don Pensack United States of America
  • Issue with my Coronado PST: shift towards green
    by c12marin »
    4 Replies
    2937 Views
    Last post by Solsearcher Canada
  • Aperture size and "seeing" conditions
    by Piet Le Roux South Africa »
    37 Replies
    15522 Views
    Last post by OzEclipse Australia
  • laser ray tracing the zenith prisms
    by j.gardavsky Germany »
    6 Replies
    3186 Views
    Last post by j.gardavsky Germany
  • Finally it looks as if my Antares Versascope will guide.
    by Greenman Great Britain »
    1 Replies
    2075 Views
    Last post by Greenman Great Britain
  • Difraction Rings
    by Jones »
    1 Replies
    2006 Views
    Last post by Bigzmey United States of America
  • Geometrical optics and focuser
    by turboscrew »
    6 Replies
    3796 Views
    Last post by ARock
  • night vision
    by yobbo89 Australia »
    5 Replies
    3748 Views
    Last post by yobbo89 Australia
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