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Converging verticals etc.

andreweugene
Hi,

this is my first post on the forum, so I don't know whether this has been touched on before, if so my apologies.
I have a P25 on a Hasselbad 503, and although I have an adaptor for my Sinar, I never use it. The lenses don't seem to perform as well as the Hasselblad's, and - let's face it - it's means a lot more work for no real gain. I shoot a fair amount of stuff slightly from above (a CD rack yesterday, for example) and corrected the converging verticals in PhotoRetouchPro. ( I know it can be done in PS, I just find PRP easier.)

My question is: among all the recent improvements PhaseOne have introduced, I haven't noticed a grid for correcting converging verticals/horizontals yet. Am I missing something, or has this not yet been recoginised? Or am I the only one to think it would be a great idea? My Photoshop work has been reduced to an absolute minimum thanks to CaptureOne, and this would ease my workflow even more.

Cheers, Andrew
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Comments

8 comments

Date Votes
  • Ulf Liljegren
    If you mean arbitrary rotation then please see section 2.4 in the help file!
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  • andreweugene
    Thanks Ulf,

    I am familiar with the rotation tool and use it frequently.

    What I am hoping for, is a tool which allows converging verticals (or horizontals) caused by the absence of movements on a Hasseblad, (or more or less anything other than a view camera) to be corrected to parallel in CaptureOne. Changing a \"V\" shape to an \"H\" shape, so to speak.

    Feel sure that architectural photographers, amongst others, would be really impressed if such a feature were included.
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  • Ulf Liljegren
    Perspective correction you mean then.
    We have been looking in to a tool like this but I do not have any idea on when and if it will be available.
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  • Ulf Liljegren
    Perspective correction you mean then.
    We have been looking in to a tool like this but I do not have any idea on when and if it will be available.
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  • Stephen11
    Andrew,

    Have you tried using any of the new Digitar lenses on the Sinar, I struggled with my old film lenses and had a demo with a Digitar lens and it made a world of difference. Extreme movements are not posibble, but you'll be able to acheive the kind of corrrection that you're after.

    Regards

    Steve
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  • andreweugene
    [quote="Steve VC" wrote:
    Andrew,

    Have you tried using any of the new Digitar lenses on the Sinar, I struggled with my old film lenses and had a demo with a Digitar lens and it made a world of difference. Extreme movements are not posibble, but you'll be able to acheive the kind of corrrection that you're after.

    Regards

    Steve


    Hi Steve,

    yes I'm sure you are right, but much of what I do is "quick and dirty" studio work, where a Sinar arrangement would slow me down too much - and it would take too long for a return on investment.

    I'm encouraged by Ulf's comments that they are looking into perspective correction at PhaseOne. Who knows, maybe in the next update?

    Cheers, Andrew
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  • jjlphoto
    In addition to a perspective tool, the addition of a barrel/pincushion distortion tool would be helpful as well. The one that ACR has is bogus. It is a generic slider that does not correct gull-wing or moustache distortion common in many wide angle lenses. It needs to be based on the PanoTools formula like PTLens.

    The Bibble RAW Processor has added a PTLens feature, and has coefficients built-in for most lenses, and you can add your own custom coefficients for unsupported lenses as well. I am in the process of testing it, and it really is a nice feature as it saves a step from having to use a PanoTool/PTLens plug-in in Photoshop. And doing it during the RAW conversion would undoubtably create a better result as well if done using a Spline 36 interpolation method. (rather than plain Bicubic interpolation)
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  • Ulf Liljegren
    ...at the same time I have to agree with Steve VC
    It is always better shooting it right from the start.
    The more corrections the more you will loose quality.
    It might be so simple that we can not do it right now while guarantee image quality.
    Just a thought not a conclution. 🙄
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