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Thread: The quality and technical differences in Process lenses at 600mm and longer?

  1. #31

    Join Date
    Jul 2016
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    3,946

    Re: The quality and technical differences in Process lenses at 600mm and longer?

    Quote Originally Posted by Asher Kelman View Post
    relatively low cost.
    I got my mint LOMO O-2 600mm (4/4 Dialyte) for some $30, now they are more expensive, perhaps $150 can be offered.

    Lens lp/mm ratings in russian catalogs were very low, but I guess that testing conditions were quite different (%MTF) in the soviet times. I was not expecting much, but I've been inspecting several 8x10 shots and the lens it's very sharp, I'm curious about performance, and I plan to check it well. If no enlargement it's planned for sure it has way more IQ than required for total graphic quality.

    it has a primitive coating, but's coated.


    https://www.arnecroell.com/eastern-block-new.pdf

  2. #32

    Join Date
    Dec 2001
    Location
    NJ
    Posts
    7,418

    Re: The quality and technical differences in Process lenses at 600mm and longer?

    Farid, you're trying to be another Richard Learoyd. Google him. You might even try to find him. I don't do anything remotely like what he does so am not a very good person to ask about what he does, how he does it, and how he solved problems.

    Learoyd uses, according to my friend Eric Beltrando, a 760 mm Apo-Ronar. He started with a 1200 Apo-Saphir, found it too long.

    You should learn close-up photography arithmetic before you spend a penny on anything but that and before you dream more. You're a new arrival here, may not be aware of all of this site's resources. Look in the FAQs for information about lenses and about close-up work. There's another resource, a list of links to lens catalogs and so on, that you should also consult. A link to it is in the first post of this https://www.largeformatphotography.i...mainly)-lenses discussion. In particular, see its discussion of books on closeup photography. If I were you I'd buy a copy of Lefkowitz and study it.

    I've never understood how people who use tent cameras maintain lens-film plane alignment. To me that problem seems quite difficult.

    You're new here, we know very little about you and your experience/skills. Please tell us more, it will make communicating with you easier.

    Good luck, have fun,

    Dan

  3. #33

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    Dec 2001
    Location
    NJ
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    7,418

    Re: The quality and technical differences in Process lenses at 600mm and longer?

    Quote Originally Posted by Pere Casals View Post
    I got my mint LOMO O-2 600mm (4/4 Dialyte) for some $30, now they are more expensive, perhaps $150 can be offered.

    Lens lp/mm ratings in russian catalogs were very low, but I guess that testing conditions were quite different (%MTF) in the soviet times. I was not expecting much, but I've been inspecting several 8x10 shots and the lens it's very sharp, I'm curious about performance, and I plan to check it well. If no enlargement it's planned for sure it has way more IQ than required for total graphic quality.

    it has a primitive coating, but's coated.


    https://www.arnecroell.com/eastern-block-new.pdf
    Papi, in the USSR resolution was usually measured at full aperture.

  4. #34

    Join Date
    Jul 2016
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    3,946

    Re: The quality and technical differences in Process lenses at 600mm and longer?

    Quote Originally Posted by Dan Fromm View Post
    Papi, in the USSR resolution was usually measured at full aperture.
    Thanks Dan, it's always a pleasure to learn something from you.

    The LOMO 600 (@ f/22) shaped very well a cigarette butt from 170m far, so I guess that at least 40Lp/mm had to be there. I'll check it.

  5. #35

    Join Date
    Aug 2019
    Posts
    18

    Re: The quality and technical differences in Process lenses at 600mm and longer?

    Quote Originally Posted by Dan Fromm View Post
    I've never understood how people who use tent cameras maintain lens-film plane alignment. To me that problem seems quite difficult.
    i would maybe do it with a laser measuring device... or similar but i know what you mean...



    Hi Dan,

    thanks for your response.

    Quote Originally Posted by Dan Fromm View Post

    You're new here, we know very little about you and your experience/skills. Please tell us more, it will make communicating with you easier.
    this is stuff i do most of them taken with the D3s Nikon and Leica M9


    www.faridlaid.com


    but i also have the PB-6 Bellow mount from nikon...usually combines with the macro 105 f 2.8 nikkorr lens ... but i also used the 20mm retro mouned .. not much into macro though at the moment.

    I own 3x 1200 Profoto generators and 3 1200W Lights ... so enough light to get something out of it i hope


    I just have no clue about the ratios soon as i take a lens at a sertain distance from the body

    smiles
    farid

  6. #36

    Join Date
    Oct 2008
    Location
    Summerville, SC
    Posts
    1,319

    Re: The quality and technical differences in Process lenses at 600mm and longer?

    farid, Impressive images on you web site!

  7. #37

    Join Date
    Aug 2019
    Posts
    18

    Re: The quality and technical differences in Process lenses at 600mm and longer?

    thanks a lot Jon, glad you like it

    best regards
    farid

  8. #38

    Join Date
    Sep 2017
    Posts
    58

    Re: The quality and technical differences in Process lenses at 600mm and longer?

    I think what might be interesting for you is work of Brendan Barry https://brendanbarry.co.uk/category/work/

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