General Optics

Discussion of optical systems and their characteristics.
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  • Optics Websites
    by mikemarotta »
    18 Replies
    23906 Views
    Last post by Don Pensack United States of America
  • How a lens creates an image
    by Nakedgun United States of America »
    3 Replies
    999 Views
    Last post by John Baars Netherlands
  • What has happened with the Explore Scientific love?
    by Lady Fraktor Slovakia »
    41 Replies
    7422 Views
    Last post by Mike Q United States of America
  • Medidas del espejo primario y secundario
    by lunaluser Argentina »
    2 Replies
    1290 Views
    Last post by lunaluser Argentina
  • Focal Length
    by Graeme1858 Great Britain »
    13 Replies
    1723 Views
    Last post by Don Pensack United States of America
  • Bell Howell Objective 36" F/8 - What type of Lens Elements are in it?
    by TheButcher United States of America »
    7 Replies
    1298 Views
    Last post by Michael131313 Mexico
  • Last chance to purchase :)
    by Lady Fraktor Slovakia »
    2 Replies
    870 Views
    Last post by Lady Fraktor Slovakia
  • Correcting coma in my 102 f/5 Startravel
    by John Baars Netherlands »
    18 Replies
    2968 Views
    Last post by Lady Fraktor Slovakia
  • The Barlow Lens ?
    by Frankskywatcher United States of America »
    36 Replies
    5267 Views
    Last post by Frankskywatcher United States of America
  • Optical Reports
    by Lady Fraktor Slovakia »
    4 Replies
    1397 Views
    Last post by John Baars Netherlands
  • Zoom EP questions
    by Ylem United States of America »
    6 Replies
    1551 Views
    Last post by messier 111 Canada
  • Is this ruined?
    by Frazman United States of America »
    10 Replies
    1884 Views
    Last post by Frazman United States of America
  • Understanding the (so-called) Dawes Limit
    by mikemarotta »
    3 Replies
    18435 Views
    Last post by Don Pensack United States of America
  • Bino-viewing
    by Nakedgun United States of America »
    1 Replies
    1021 Views
    Last post by Lady Fraktor Slovakia
  • Purchased a 2" Altair Astro Prism Diagonal
    by davesellars »
    11 Replies
    2493 Views
    Last post by Bigzmey United States of America
  • Prism versus diagonal in an old f/9 ED Vixen
    by John Baars Netherlands »
    10 Replies
    2880 Views
    Last post by Lady Fraktor Slovakia
  • Monocular review
    by Butterfly Maiden Great Britain »
    4 Replies
    1820 Views
    Last post by JayTee United States of America
  • Straight Spotting Scope???
    by Colorado Luckydog »
    9 Replies
    3090 Views
    Last post by Richard South Africa
  • Some lenses to play with on the cloudy days
    by j.gardavsky Germany »
    5 Replies
    5087 Views
    Last post by j.gardavsky Germany
  • Change your eye pupil size voluntarily?
    by AntennaGuy United States of America »
    15 Replies
    11485 Views
    Last post by AntennaGuy United States of America
  • Monolithic SCT from single cylider of glass
    by Chich Canada »
    0 Replies
    3453 Views
    Last post by Chich Canada
  • Coma correctors
    by turboscrew »
    6 Replies
    5722 Views
    Last post by turboscrew
  • Collimation change by off-center secondary's weight
    by SkyHiker United States of America »
    3 Replies
    3095 Views
    Last post by Don Pensack United States of America
  • The Conrady's Chromatic Condition ...
    by j.gardavsky Germany »
    7 Replies
    5378 Views
    Last post by Lady Fraktor Slovakia
  • Advances in telescope optics
    by The Happy Parrot »
    12 Replies
    6360 Views
    Last post by Thomas_M44
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