General Optics

Discussion of optical systems and their characteristics.
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  • Optics Websites
    by mikemarotta »
    18 Replies
    16653 Views
    Last post by Don Pensack
  • Understanding the (so-called) Dawes Limit
    by mikemarotta »
    3 Replies
    16510 Views
    Last post by Don Pensack
  • What has happened with the Explore Scientific love?
    by Lady Fraktor »
    9 Replies
    209 Views
    Last post by Nakedgun
  • Bino-viewing
    by Nakedgun »
    1 Replies
    47 Views
    Last post by Lady Fraktor
  • Purchased a 2" Altair Astro Prism Diagonal
    by davesellars »
    11 Replies
    298 Views
    Last post by Bigzmey
  • Prism versus diagonal in an old f/9 ED Vixen
    by John Baars »
    10 Replies
    606 Views
    Last post by Lady Fraktor
  • Monocular review
    by Butterfly Maiden »
    4 Replies
    405 Views
    Last post by JayTee
  • Straight Spotting Scope???
    by Colorado Luckydog »
    9 Replies
    923 Views
    Last post by Richard
  • Some lenses to play with on the cloudy days
    by j.gardavsky »
    5 Replies
    3405 Views
    Last post by j.gardavsky
  • Change your eye pupil size voluntarily?
    by AntennaGuy »
    15 Replies
    8430 Views
    Last post by AntennaGuy
  • Monolithic SCT from single cylider of glass
    by Chich »
    0 Replies
    2402 Views
    Last post by Chich
  • Coma correctors
    by turboscrew »
    6 Replies
    3776 Views
    Last post by turboscrew
  • Collimation change by off-center secondary's weight
    by SkyHiker »
    3 Replies
    1703 Views
    Last post by Don Pensack
  • The Conrady's Chromatic Condition ...
    by j.gardavsky »
    7 Replies
    3243 Views
    Last post by Lady Fraktor
  • Advances in telescope optics
    by The Happy Parrot »
    12 Replies
    4118 Views
    Last post by Thomas_M44
  • 10 Inch Dob Under Bortle 4 Skies Vs. 6 Inch Refractor Under Bortle 2 Skies
    by Refractordude »
    10 Replies
    3867 Views
    Last post by Ylem
  • 127mm Lens
    by LDW47 »
    7 Replies
    2700 Views
    Last post by LDW47
  • Collimation tools for faster scopes?
    by turboscrew »
    22 Replies
    8885 Views
    Last post by Don Pensack
  • How to Calculate the Limits of Your Telescope
    by mikemarotta »
    8 Replies
    3428 Views
    Last post by Don Pensack
  • Issue with my Coronado PST: shift towards green
    by c12marin »
    4 Replies
    2142 Views
    Last post by Solsearcher
  • Aperture size and "seeing" conditions
    by Piet Le Roux »
    37 Replies
    13050 Views
    Last post by OzEclipse
  • laser ray tracing the zenith prisms
    by j.gardavsky »
    6 Replies
    2517 Views
    Last post by j.gardavsky
  • Finally it looks as if my Antares Versascope will guide.
    by Greenman »
    1 Replies
    1660 Views
    Last post by Greenman
  • Difraction Rings
    by Jones »
    1 Replies
    1665 Views
    Last post by Bigzmey
  • Geometrical optics and focuser
    by turboscrew »
    6 Replies
    3216 Views
    Last post by ARock
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