Iliah Borg

Iliah Borg

Lives in United States AK, United States
Has a website at http://www.libraw.org/
Joined on Nov 11, 2002

Iliah Borg's recent activity

  • Replied in have a look
    How do you mean? Messing is a nice word :)
  • Replied in have a look
    but raw is a much better starting point. It is not, because it demonstrates that JPEG is damaged while raw is not. The mantra "raw is not an image" is false.
  • Replied in have a look
    It proves a simple fact that for the same shot JPEG is overexposed by 1+ stop, while raw is OK. But compressing shadows and highlights, as well as WB application, is invariable. Any camera does ...
  • Replied in have a look
    Same raw again: Now, raw exposed 1/3 hotter: Same as above but with overexposure warning turned on:
  • Replied in have a look
    The progress in both film and digital was always for more dynamic range - exactly because that is what the trade of photography needs.
  • Replied in have a look
    Because of underexposure compared to raw JPEGs have less resolution and more noise in midtones as well.
  • Replied in have a look
    Out of arguments? :)
  • Replied in have a look
    The decision is better saved for image processing stage. No good in damaged originals. What eye can see - well, in that particular scene it was easy to see all of it.
  • Replied in have a look
    It is not about the look. It is about the exposure. To get rid of the clipping in highlights JPEG needs to be exposed more than 1 stop less compared to raw. And details in shadows do not exist ...
  • Replied in have a look
    That's not so. JPEGs have tone curve and white balance baked in. That is why the shot above is strongly overexposed in JPEG (more than 1 stop) and 1/3 EV underexposed in raw. Raw preserves much ...
  • Replied in have a look
    Really? So in your view the proper technique is underexposing by 1.5 stops? :)
  • Replied in have a look
    First, a JPEG, out of camera: and now the raw from the same shot:
  • It is a very limited view to consider sensor only. Not just because the camera is much more than a sensor, but also because there is much room for image quality improvement even with a given sensor.
  • That's why it is better to check things. You may want also to check how engineering DR is defined.
  • Light. Was explained before. Gaining ~half a stop in shadows, loosing 1 stop to clipping in highlights.
  • Actually, I left out one more misconception - your hint to unity gain. Why to experiment? Because you will see something like this (my D4s) ISO EngDR(in stops) 100 12.8 200 12.3 400 11.7 800 10.8
  • Nope. Experiment with it and see.
  • Aren't you discussing the ISO setting in the quote above? Increasing exposure, on the contrary, does not affect dynamic range of the raw output.
  • For raw image, per channel exposure / white balance would be something to take into account also IMHO. Because, for example, as shot neutral with studio halogen lights is (1356,1758,538) when the ...
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Total messages 16422
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Last upload Aug 26, 2011