[Leica] I Tried an M8; Color Question

[len-1 at comcast.net (Leonard Taupier)]

Hi Bob,

Of course your questions are very valid. The photos are what they  
are. I have seen a shift in the same type of scene (indoor lighting)  
without changing the ISO. I feel the Auto WB may be getting fooled at  
times by the high IR content in the light. I have IR cut filters for  
most of my lenses now (not furnished by leica) and I don't see the  
shift. Maybe I need to take more photos. Today would be a good day  
with and without filters. I'll report what I find. I'll also go up  
and down the ISO range.

Magenta cast: I don't see that in your photos. The black bags look  
black. I don't know what kind of material is most susceptible. I do  
have a LowePro S&F Reporter 500 black bag to experiment on. The  
material might be different though.

Len


On Feb 18, 2007, at 11:37 AM, Robert D. Baron wrote:

> Don Dory wrote:
>
>> Don't sweat the wb Bob.  Shoot in DNG and all will be very well
>> indeed. Minor tweaking in the converter of your choice, not much
>> different than color film but faster and easier. Forget the jpg's,
>> raw is good.
>
> Don, I should have been more clear.  The shots I posted had to be  
> converted to .jpg to be uploaded but the original shots were
> .dng; I have only shot raw files for the last several years. I  
> merely opened these .dng image files in the beta of Adobe Lightroom  
> and I immediately noticed the odd (to me) color shift as the ISO  
> had been adjusted upward when they were made; I did no sharpening  
> or color management whatsoever.
>
> To reiterate my original question:
>
>> One question I have is about the color it produced on my test;  I may
>> be having brain fade and not remembering something I should know, but
>> please take a look at these 4 test shots from ISO 160 to 2500 (you
>> can see the ISO of each when you click through from the thumbnails to
>> the full size images) and tell me why there is such a color shift as
>> the ISO increases:  http://www.bobbaron.com/M8TestFeb07/index.htm
>
> I'm trying to be an observer, not a complainer.  I'm just curious  
> as to 'why'.
>
> And while we are talking I've got one more question for those of  
> you with better color vision than me (probably most all of you;  
> I've got typical male red-green anomalous vision to some small but  
> apparent degree):  I made it a point to include the rack with black  
> LowePro gadget bags in the right 1/3 of these shots....I assume  
> they contain some synthetic material and was wondering if they  
> would display the infamous magenta color cast.  Do they?
>
> Again, I like the camera overall and I'm sure I'll add one to my  
> bag at some point.  These are just questions I'm asking.
>
> The LUG is one of the few places I can get answers......all kinds  
> of answers....  ;-)  ;-)
>
> Thanks and best regards,
>
> --Bob
>
>
>
>
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