Banding issue with K10D

[Lance B]

Hey Gordon,
I've been reading a lot of your posts and want to thank you for the
effort you are putting into this, very much appreciated!
I have upgraded to ver1.1 but haven't done much testing except for
some shots around the house, gonna do some more tonight.
I recently saw some samples from someone using the K10D at 1600 and
the results were far better than anything I've seen so far. He was
shooting in JPEG mode Bright with the new ver1.1
I've only been doing RAW DNG's... so I'm wondering (and gonna test
a few) if perhaps they included in the firmware some special "Al
Gore Rhythm" (lol) with in-camera processing of JPEGs that doesn't
take affect with the RAW files... does that make sense? is it
possible? I don't how these things work, I'm just guessing.
I've also wondered if it has something to do with the fact that the
RAW converter I'm using isn't "tweaked" for K10D DNGs. I'm using
AdobeCR ver 2.4 and there's a few weird things that happen with the
DNGs from this camera, but nothing big - e.g. when I shoot at WB
daylight, the ACR says the images are around 7000K, but the colours
looks fine anyway. I do know that Aperture 1.5.2 won't even accept
the DNGs yet as it hasn't been updated to support the K10D yet
(weird I know).

My experiences with the K10D, DNG and ACR 2.4 are that it introduces noise and this may adversely affect the banding, I do not know. Silkypix works very well as it is K10D RAW profiled and so far I have yet to see banding, but then I rarely shoot over ISO400.

Perhaps the Raw converter needs to be tailored for this camera.
Again, I have no idea about this stuff, I'm only grasping at straws.
But I'm going to compare the JPEG capture against the RAW capture
and see what happens.
--
Joshua Hakin Photography
http://www.hakinphoto.com

--
Lance B

http://www.pbase.com/lance_b
GMT +10hours

 

[JensR]

Hi Lance!

I did a few tests with my *ist D and the K10D and it would seem as
thought the D sensor is about a stop more sensitive than the K10D
at the same ISO200, same aperture setting, the same lens, for the
same camera histogram spike when taken of a grey card. In other
words, the D would give a shutter speed of say 1/200sec and the
K10D would give a shutter speed of 1/100sec.

Umm? What the? That's weird to say the least. I do not remember Phil stating that ISO declaration was "off" in his review, as he normally does when this is the case. Even then, one stop off is more than even Canon (who "round" generously) would do.

Obviously, I can't confirm because of only having one DS

Did you adjust both cameras with same EC?

Resaon I ask: When both cameras have a different "desired brightness" setting, and the ISO is calculated to give this, then, adjusting so that both cameras give the same brightness is actually overriding the design intent. This is not to say your findings are incorrect, just (a try for) an explanation where it comes from.

Cheers
Jens

--

'Well, 'Zooming with your feet' is usually a stupid thing as zoom rings are designed for hands.' (Me, 2006)
http://www.jensroesner.de/
--=! Condemning proprietary batteries since 1976 !=--

 

[CapitaineAbitibi]

Gordon already explained this JPEG vs RAW discrepancy in this same
thread:

http://forums.dpreview.com/forums/read.asp?forum=1036&message=21813047

Thanks, I lost track of some discussion in this thread even though I was the "originator"

 

[CapitaineAbitibi]

This is an old one, but I did update to firmware 1.1 last week and it seems to have resolved part of the issue. I can still notice some banding but it's just because I'm only checking for it. And I can now push my pictures without banding showing up on the picture, which is great for shows.