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Thread: Process lens image circle nature

  1. #21
    Drew Wiley
    Join Date
    Sep 2008
    Location
    SF Bay area, CA
    Posts
    13,860

    Re: Process lens image circle nature

    Yeah, Gerogons and their private-label reincarnations, were cheap lenses for compact stat cameras.

  2. #22

    Join Date
    Jul 2008
    Posts
    1,586

    Re: Process lens image circle nature

    Maybe a single element achromat lens instead of a highly corrected process lens would do good. Many of these long focal length process lenses have been taken up by ULF folks paying !$! for them. Single element achromat could be found at modest cost at various optics surplus or hobby astronomy want-ads.


    Bernice


    Quote Originally Posted by erian View Post
    I plan to build a camera obscura. The one where you can walk in. I plan to focus by moving the back inside the camera. I am thinking to use large photo paper and by large I mean really large like 1 meter by 60 cm or similar.

  3. #23

    Join Date
    Jul 2016
    Posts
    4,356

    Re: Process lens image circle nature

    Quote Originally Posted by Dan Fromm View Post
    There are dialyte type Apo-Nikkors, too.
    Yes, I learned that time ago in your article http://www.galerie-photo.com/apo-pro...ikkors-en.html

  4. #24

    Join Date
    Aug 2015
    Location
    Bellingham, WA (displaced Canadian)
    Posts
    400

    Re: Process lens image circle nature

    Quote Originally Posted by erian View Post
    Nice, this is exactly what I was looking for.

    Does anybody know this about Ronars and Artars?
    My APO Ronar 480mm f/9 MC projects a circle of illumination of ~800mm across.

  5. #25

    Join Date
    Sep 2017
    Posts
    134

    Re: Process lens image circle nature

    I ordered Goerz 30 inch F12.5 Apochromat Artar for my project. The main influence was weight and tiny bit shorter focal length. With both combined I could even hope to use this lens on my 11x14 for landscape photography (camera extends about 77 cm).

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