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RyanJWilliams
Participant
February 26, 2013

P: 4.4 bug with new X-Trans handling algorithms

  • February 26, 2013
  • 12 replies
  • 545 views

Lightroom 4.4 bug with new X-Trans handling algorithms. It looks like the blue channel is clipping in some instances, severely distorting handling of highlights. Here's an example:

http://forums.dpreview.com/forums/pos...

RAW (RAF) file available here:

http://dl.dropbox.com/u/37346336/1275...

On page five of the thread someone more or less figured out what the issue is (related to camera calibration defaults):

http://forums.dpreview.com/forums/thr...

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    FeedbackCommunityMember
    Inspiring
    February 27, 2013
    If camera calibration is suspected, why not make your own camera profile? The shipped profiles are made with a small subset of all the possible responses a model can have, and sometimes a specific body can be at the other end of that bell-curve.
    ssprengel
    ssprengel
    Inspiring
    February 27, 2013
    I don' t know as this is a bug with X-Trans, I think it is just a problem with the Adobe Standard profile for many cameras. This photo happens to be with an X-Trans camera is all.
    Here is a oversaturated-blue example with a Nikon D7000: http://forums.dpreview.com/forums/thr...

    Of course with Nikon cameras, Adobe supplied so-called Camera-match profiles to better mimic the camera-JPG response. The Fuji cameras have no such extra attention given.

    For the night street-scene photo, the "page five" solution only works on it because there isn't much other legit blue in the photo, otherwise that blue would be very desaturated.
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