MRW (7D version) to DNG conversion

Discussion in 'Digital Photography' started by steven, Dec 31, 2004.

  1. steven

    steven Guest

    Hi,
    I'm looking for a MRW (Minolta RAW) to DNG converter. None of those I found
    (including Adobe DNG converter dd. 2004-09-26) seem to be able to 1) read
    MRW Dynax 7D version, AND 2) write DNG.
    I thought PolyImage (http://www.polybytes.com/) was gonna help me out, but
    it can only *read* DNG. :-(
    Did I overlook something?
    (Sorry if this question was asked and answered before)

    Steven

    PS: I wouldn't mind writing my own converter, but Adobe's "complete" (sic)
    DNG specification looks pretty incomplete to me: all tags are described
    alright, but not the file structure. For MRW I have a much more complete
    document.
     
    steven, Dec 31, 2004
    #1
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  2. steven

    John Bean Guest

    It will be released with ACR 2.4, currently in beta. There's no beta version
    of the DNG converter available.

    DNG is TIFF format.
     
    John Bean, Dec 31, 2004
    #2
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  3. steven

    steven Guest

    Do'h! Overlooked that. ACR2.4 opens MWR alright, but as it doesn't save DNG
    so my problem basically remains. :-(
    Do you mean as far as the payload is concerned? I find tags in the DNG spec
    which aren't in TIFF. Also, If DNG == TIFF, why "devise" DNG in the first
    place?
    Thanks anyway for your reply.
     
    steven, Jan 1, 2005
    #3
  4. steven

    John Bean Guest

    No, nothing except the stand-alone converter will save DNG. PS9 and ACR 3.x
    will no doubt address this.
    No, I mean as far as the container is concerned. TIFF file format is a
    container, DNG is a TIFF whose contents are used in a specialised way as
    defined by the Adobe specification. TIFF tags are designed to be extensible
    and those formats whose contents differ from "standard" TIFF in major ways
    usually use their own extension to avoid confusion. Several existing camera
    raw formats do exactly this, Pentax PEF and Nikon NEF for example. However
    you'll find that any program that can parse a TIFF header and extract a
    thumbnail (if one exists) will be able to do this equally well with DNG,
    NEF, PEF, TIF...

    I suggest you read up on TIFF formats, maybe Adobe's DNG specification will
    become clearer.

    --
    John Bean

    I think computer viruses should count as life. I think it says something
    about human nature that the only form of life we have created so far is
    purely destructive. We've created life in our own image (Stephen Hawking)
     
    John Bean, Jan 1, 2005
    #4
  5. steven

    JPS Guest

    In message <1kk5t68wntfno$>,
    The DNG files contain a TIFF thumbnail, but the RAW data itself is just
    that - RAW data.
    --
     
    JPS, Jan 2, 2005
    #5
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