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03-10-2011, 04:41 AM   #16
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Can you share raw file?

03-10-2011, 05:05 AM   #17
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QuoteOriginally posted by awaldram Quote
The blue channel is blown causing the effect, This maybe because the jpeg container cant hold it , or the RAW was over exposed I cant tell.
Yes, I've seen this (well, never as extreme, but similar) when trying to salvage photos with severely overexposed skies.
03-10-2011, 07:00 AM   #18
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Yeah, if the exposure was way off, then that would explain it. But in that case, the in-camera preview JPEG wouldn't have looked the same, it would have had blown-out skies..?
03-10-2011, 07:18 AM   #19
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If just the blue channel is blown the sky will look blue. You need all three channels blown to produce a white sky.

03-10-2011, 02:32 PM   #20
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the k-5 display doesn't show the "raw file". the raw files are not image files as such, and they are not directly displayable as such, so any time you're thinking "i'm seeing the raw file", stop and think again, because you're seeing something else. in this particular case, it's the embedded, very highly compressed (so low quality) jpg which is found in the raw file.

process the raw file apropriately, and you will no longer see this. you can also try shooting raw+jpeg, so the camera has a nicer jpeg to display for you when reviewing pictures
03-10-2011, 02:36 PM   #21
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QuoteOriginally posted by Erik Quote
You are essentially correct but I shoot RAW exclusively and I have NEVER seen this sort of banding even on the low quality preview JPEGs. Furthermore, there is no trivial way of extracting the low quality JPEG from the RAW file so if the OP has developed the RAW file and saved as a JPEG (and not a low quality one, either, judging from the detail present in other areas of the photo, and the fact that the JPEG is indeed 24-bit, not 16 as someone assumed) then that is not the issue.
extracting the low quality jpeg is trivial, and is supported by many applications (especially the likes of faststone and so on, viewers), it is a very valuable feature because it enables you to have very fast previews for the raw files. it's easy to make the mistake of extracting that jpeg instead of actually processing the raw file, in some applications.
03-10-2011, 03:06 PM   #22
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Part of it could be because of the lens used. Try the same shot with a Limited sometime.
03-10-2011, 03:33 PM   #23
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QuoteOriginally posted by Ron Kruger Quote
Part of it could be because of the lens used. Try the same shot with a Limited sometime.
joke, right?

03-10-2011, 05:14 PM   #24
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No joke at all. Images begin with the lens and are greatly effected by how that lens renders colors and contrasts.
03-10-2011, 05:39 PM   #25
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true in general, has nothing to do with the current discussion. those are digital artifacts, lenses are "analogue". the lens has nothing to do with the (non-)problem which was reported.
03-10-2011, 08:45 PM   #26
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Really. Have you tested two different lenses with the same shot to be sure?
03-11-2011, 04:22 AM   #27
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I will try to uload the the file during the weekend . Many thanks for your answers to all of you.
03-11-2011, 04:48 AM   #28
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no way lense could be the reason.
in my opinion the problem is in 'analogue to digital conversion' or in postprocessing.
the unit could'n find sufficient number of adequate colorur values to express the real colour dynamics.


when You use for example contrast-based effect such problems can occure, because algorithm often assigns the same output value to numerous input values.
03-11-2011, 08:07 AM   #29
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Still, it's a beautiful picture. The blue, green and brown colors work well together. I can get similar results from my k7, but not the range without PP.

Bill
03-11-2011, 08:34 AM   #30
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Apparently it is not uncommon.

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