This might be completely wrong, but I wonder if the WB settings were affected 
by the differing
specular reflections from the water surface?

John Coyle
Brisbane, Australia



-----Original Message-----
From: PDML [mailto:[email protected]] On Behalf Of Stan Halpin
Sent: Thursday, 6 March 2014 4:28 AM
To: Pentax-Discuss Mail List
Subject: Re: K-3 wonkiness

Follow-up:

I went ahead and used both cameras today. Same strange color balance in the 
camera A jpg's.
To better explain what I am talking about, here is a screen shot taken while 
downloading into
Lightroom. The thumbnails shown have not yet had LR generate a preview and it's 
own version of a
thumbnail based on the DNG. The first 7 of 8 thumbnails shown were taken in 
fairly rapid sequence as
I was following five small boats across the scene, trying to get a shot with a 
good juxtoposition of
the five boats and the lager sailing vessel behind. So all seven shots had the 
same shooting
parameters. You can see the color variation in the thumbnnails. 

http://photos.stanhalpin.com/p155717848/hC9DBF3E#hc9dbf3e

I did wash the camera with cold water prior to using it (;-)> and I did check 
all settings to verify
that I have no "color filters" or other offending choices activated.

stan

On Mar 4, 2014, at 3:29 PM, Stan Halpin wrote:

> Not a biggie since i haven't lost anything yet, but this was a bit 
> disturbing...
> 
> So I carry two K-3's, A and B. A is used more often, it hangs from a wrist 
> strap. B stays in the
backpack or sometimes around my neck if I am switching back and forth between 
wide and long for
example. I occasionally chimp, primarily to check the RGB histograms to make 
sure I haven't
inadvertently changed a setting and put myself out of range. Today on my A 
camera I was noticing a
strange color cast on the LCD. After a few more shots I became convinced that 
something was wonky,
switched to the B camera and went on.  
> 
> I just downloaded the shots from camera A via Lightroom. As long as Lightroom 
> was displaying
thumbnails based on the in-camera jpg rendering, the color balance was way off 
still. But once LR
rendered previews, built from the RAW data, everything looks just fine. So, the 
jpg portion of my
K-# processor has a random variable color-balance problem, but the basic DNG 
capture is just fine.
To be clear, there is not a consistent color balance bias toward too much green 
in the jpg's for
example. Rather, it is off in a random way for each shot.
> 
> Since I only shoot DNG and don't capture jpeg's in parallel, the good news 
> here far outweighs the
bad. But still unsettling...
> 
> stan
> 


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