Showcase M8 Monochrome Conversion comparison RAW vs DNG, M8RAW2DNG V1.2

Discussion in 'Leica M and LTM Mount Camera Sample Image Showcase' started by Brian, Feb 28, 2014.

  1. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    Version 1.2 of M8RAW2DNG is available,

    http://m8raw2dng.de/

    is improved over the prior versions, and a good explanation of the difference is up.

    For anyone using the M8 for monochrome conversions, this technique is worth looking at.

    Converted using LR4.4 presets for Blue and Yellow filters, no exposure/contrast adjustments made. The 16-bit files had room to pull details from the shadows before exporting to 8-bit JPEG.

    16-bit, simulated Blue filter.

    12843332594_673bd2f807_b.
    DNG-16 Raw Test by fiftyonepointsix, on Flickr

    12843012563_d0ca9d4f75_b.
    DNG-16 Raw Test by fiftyonepointsix, on Flickr

    8-Bit DNG, simulated Blue filter.

    12843112295_cdeb62a119_b.
    DNG8 Raw Test by fiftyonepointsix, on Flickr

    12843199513_6310fd7bde_b.
    DNG8 Raw Test by fiftyonepointsix, on Flickr

    The full-resolution images are loaded on FLICKR.
     
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  2. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    16-Bit Raw, Simulated Yellow filter.

    12843297224_243446c46b_b.
    DNG16-test by fiftyonepointsix, on Flickr

    12842855615_37cba508e6_b.
    DNG16-test by fiftyonepointsix, on Flickr

    8-bit DNG, Simulated Yellow.

    12843463784_cf3a9bc335_b.
    DNG8 Raw Test by fiftyonepointsix, on Flickr

    12842981285_ee5e439b6a_b.
    DNG8 Raw Test by fiftyonepointsix, on Flickr

    The differences are more subtle, the 8-bit image looks like it has more contrast. That is due to the clipped shadows, that are retained in the 16-bit image.

    This software is worth having for those times when you want maximum tonal range, especially if you plan on converting to monochrome or pulling out shadow detail. It gives the same advantage as uncompressed DNG does over compressed DNG on the M9. Note that the M Monochrom does not offer compressed DNG, preserving highlights and shadow detail is more critical for a monochrome image.

    All pictures with the 1963 ZOMZ J-3, at F4 and F5.6. M8 was tripod mounted, shots taken as close together as possible cycling through the Menu setup.
     
  3. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    I pulled the shadow detail from the darkest section of the log pile, pushed the lower 1/4 of the histogram to pull this out.

    This is the 16-bit RAW converted to DNG-16.
     

    Attached Files:

  4. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    This is the DNG-8, same portion of the Histogram.

    The camera is tripod mounted, lens at F4, high shutter speed.

    There is more detail in the shadows of the 16-bit image, and it looks to have more resolution. On the DNG-8, two pixels with close intensity values get thrown into the same "bin". The 16-bit Raw file has 64 times the number of bins to work with.
     

    Attached Files:

  5. NJH

    NJH Leica Place Regular

    97
    Apr 29, 2013
    Somewhere else it was claimed another advantage is less colour noise at higher ISO (640 ISTR).

    Good work.
     
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  6. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013