Results 1 to 10 of 104

Thread: A DIY 177mm f/8 Cooke triplet for 4x5 from off-the shelf lenses that YOU can build

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. 23-May-2021, 00:23 #36
    afotandolaciudad
    afotandolaciudad is offline
    Join Date
    Dec 2020
    Posts
    35

    Re: A DIY 177mm f/8 Cooke triplet for 4x5 from off-the shelf lenses that YOU can bui

    Hello.

    How would a Rapid Rectilinear design compare to this Cooke Triplet?
    I'm planning to build a very simple compact long focus RR. I don't have lenses longer than 300mm. I'm wondering how would be to order two identical achromatic doublets and put it on both sides of a copal #3. This size is for focusing aid (and because I have this shutter available at home).
    The barrel would be easier to prepare and fewer degree of freedom mean less possibilities of go wrong.
    How would a lens like that perform at f/22 to f/45?
    Mi thoughts begin with two of this doublets (D54 f786):

    https://a.aliexpress.com/_uj4p5X

    Any thoughts?

    ____________

    I forgot to ask...
    How would this diy lens compare with my symmar 210mm converted to 370mm?
    Last edited by afotandolaciudad; 23-May-2021 at 05:11.
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Similar Threads

  1. Taylor Hobson Cooke 30" and 48" process lenses
    By diversey in forum Lenses & Lens Accessories
    Replies: 14
    Last Post: 12-Feb-2015, 09:03

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules