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Lens profiles

Jim Casler
How do we go about getting new lens profiles? Is it possible to add lens profiles (either by PhaseOne or by a user)? I'm currently shooting with a Sony SLT-55, and may well add an SLT-77 body to my gear, and I use Sony A-mount lenses (Sony and Tamron, at present). I'd love to have profiles for these, and I wonder if there's a methoid to create them.
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  • Christian Gruner
    [quote="Jim Casler" wrote:
    I'd love to have profiles for these, and I wonder if there's a methoid to create them.


    There isn't any way for an end-user to create these, as the routine is very complex and takes hours per lens.

    I would instead suggest that you create a support case asking for a profile for your preferred lens. That makes it easier to track requests for the same lens.
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  • Permanently deleted user
    [quote="Christian Gr" wrote:
    [quote="Jim Casler" wrote:
    I'd love to have profiles for these, and I wonder if there's a methoid to create them.


    There isn't any way for an end-user to create these, as the routine is very complex and takes hours per lens.

    I would instead suggest that you create a support case asking for a profile for your preferred lens. That makes it easier to track requests for the same lens.


    Hi Christian,

    In October this year I contacted your support, asking if Phase One had any use for lens calibrations, made very carefully by me for some Nikkor lenses, with the method where a polynomial function with some coefficients is used. Could you please open support case 112729, issued 2012-10-30, and let me know if you have any use for the data I very happily can provide you with in order to make Capture One even more useful. All details needed to decide whether the data I have is useful should be present in the aforementioned support case.


    Best regards,

    Lars Nilsson
    Lund, Sweden
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  • Jim MSP
    [quote="Christian Gr" wrote:
    [quote="Jim Casler" wrote:
    I'd love to have profiles for these, and I wonder if there's a methoid to create them.


    There isn't any way for an end-user to create these, as the routine is very complex and takes hours per lens.

    I would instead suggest that you create a support case asking for a profile for your preferred lens. That makes it easier to track requests for the same lens.


    Don't underestimate the abilities of your customers.
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  • SFA
    [quote="Jim MSP" wrote:
    [quote="Christian Gr" wrote:
    [quote="Jim Casler" wrote:
    I'd love to have profiles for these, and I wonder if there's a methoid to create them.


    There isn't any way for an end-user to create these, as the routine is very complex and takes hours per lens.

    I would instead suggest that you create a support case asking for a profile for your preferred lens. That makes it easier to track requests for the same lens.


    Don't underestimate the abilities of your customers.



    Or the willingness of those with requisite abilities and the desire to assist.
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  • Christian Gruner
    I have looked into the SLS case, and talked the developer in charge of the lens profiling and the implementation of these.
    We of course really appreciate when users wants to share such a large contribution with us. In this case however, there are some complications, that makes it hard for us to implement the data.
    The primary thing is that we test the lenses at a much greater distance and with a different method. Secondly, we would have to QA the user-profiles, which would take a considerable amount of time (which in turn takes time from further lens profiling, bug fixing and so on).


    I'm sorry if my previous response was a bit too short. What I should have said was "the typical end-user", as I know we have some extremely technically competent guys out there as well.
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  • Jim Casler
    Ok, Christian, I understand all of that. I have a Sony SLT-A55, and a few different pieces of glass. Should I put them all in as cases?
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  • Jim MSP
    [quote="Christian Gr" wrote:
    ....
    The primary thing is that we test the lenses at a much greater distance and with a different method. Secondly, we would have to QA the user-profiles, which would take a considerable amount of time .....


    There are many of us, if given a precise recipe (test protocol) to follow, could help you update the lens profiles reasonably quickly.
    QA would follow if 2 or more users reproduce the same profile.

    Jim
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  • SFA
    [quote="Jim MSP" wrote:
    [quote="Christian Gr" wrote:
    ....
    The primary thing is that we test the lenses at a much greater distance and with a different method. Secondly, we would have to QA the user-profiles, which would take a considerable amount of time .....


    There are many of us, if given a precise recipe (test protocol) to follow, could help you update the lens profiles reasonably quickly.
    QA would follow if 2 or more users reproduce the same profile.

    Jim



    Interesting suggestion Jim.

    I think this could work, at least in theory, to get profiles out to the wild but I am slightly less convinced that a supplier would want to take on a "third party" product untested and unchecked so to speak. From Christian's early comments I get the impression that, currently, the only way to cross check is to run the tests and that in effect this means there is little or no saving in resource. Indeed there would be a likelihood that resource would have to be distracted from other objectives by a flood (or so the users out there might hope!) of new profiles all requiring rapdi QA to avoid seriously annoying those who had taken the tome and trouble to create them.

    On the other hand if there was a possibility of being able to share independently created profiles on a "they are as they are" basis with clear statements about lack of ownership and support (assuming that people would accept that situation), then I could see some potential for allowing the tests to be run independently and the results to be shared without official support for anyone who felt they could use them.

    Whether the testers would feel this would justify their efforts, which I assume would still be non-trivial, I don't know.

    Likewise one might need to consider whether users would accept that any profiles offered were to be accepted as they are (pretty much have to I would guess) without venting should they feel that they had found something unsuitable (in their view) for their needs.

    I suppose that, should such a "crowd sourced" approcah be possible one advantage might be the potential for results to be produced with a selection examples of a particular lens. It cold be educating to see what the manufacturing tolerances that affect profile creation work turn out to be.

    Just a few thoughts to add to the discussion.

    Grant Perkins
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