Results 1 to 1 of 1
Like Tree10Likes
  • 10 Post By not_Fritz_Argelander

Thread: Sticky: Evolution of Eyepiece Design

  1. #1
    not_Fritz_Argelander's Avatar
    not_Fritz_Argelander is offline HYPER GIANT
    Points: 184,195, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    365 Days+ Registered Achievement!2 Posts Achievement20 Posts Achievement!750 Days+ Registered Achievement!First 1000 Experience Points
    Thread Award
    Join Date
    Jul 2011
    Thanked 46,406x 14,962 Posts
    Blog Entries

    Default Sticky: Evolution of Eyepiece Design

    The free pdf monograph “Evolution of the Astronomical Eyepiece” by Chris Lord is to be found at

    This is located on the website of Brayebrook Observatory, a private observatory run C.J.R. Lord D.Phil.,B.Ed.,F.R.A.S. which is used almost exclusively for double star astrometry. The homepage of the observatory is located at the link

    However navigation of the site most readily proceeds from

    There is much material on telescopes, instrumentation and observatory construction. In addition to the eyepiece evolution history other publications and resources can be found at


    For each type of eyepiece the apparent field of view, eye relief as a fraction of focal length, and the speed of the telescope for which the eyepiece is designed is listed along with the name of the design and date of introduction. A one-page summary is on page 8. The text further discusses aberrations, ghosting, and transmission characteristics. Note that the author is an astrometric double star observer and so has a low tolerance for distortion in wide field eyepieces and some judgments are made from that point of view. This does not detract from setting out the facts of eyepiece designs and their history comprehensively.

    Last edited by bladekeeper; 01-24-2018 at 06:17 AM. Reason: Dup
    Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7 Newtonians: Z12 f5 Catadioptrics: VMC110L, Intes MK66 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binocular Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker III, Vixen Porta II, Celestron CG5, Orion Sirius EQG

  2. The Following 10 Users Say Thank You to not_Fritz_Argelander For This Useful Post:

    bladekeeper (01-24-2018),DaltonSkyGazer (01-24-2018),DeanD (01-24-2018),Don Alvarez (01-24-2018),Eagleheaf (01-24-2018),ghswen (01-24-2018),j.gardavsky (01-24-2018),kukulin (01-24-2018),sketrip (03-14-2018),SpyderwerX (01-28-2018)



Similar Threads

  1. Proposal for a sticky: History of eyepiece designs
    By not_Fritz_Argelander in forum Telescope Eyepieces Forum
    Replies: 4
    Last Post: 01-24-2018, 11:19 AM
  2. Design for an eyepiece case
    By skaven in forum Telescope Eyepieces Forum
    Replies: 23
    Last Post: 12-08-2014, 04:56 AM
  3. Replies: 0
    Last Post: 10-31-2005, 05:32 AM
  4. Eyepiece design question.
    By Stephen Tonkin in forum Amateur Astronomy Forum
    Replies: 13
    Last Post: 12-06-2004, 12:29 AM
  5. Eyepiece design question.
    By Stephen Tonkin in forum UK Astronomy Forum
    Replies: 13
    Last Post: 12-06-2004, 12:29 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Powered by vBulletin Version 4.2.0
Powered by vBulletin
All times are GMT. The time now is 10:44 PM.