Archived posting to the Leica Users Group, 2006/09/20

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Subject: [Leica] Re: the dynamic range of digital
From: bd at bdcolenphoto.com (B. D. Colen)
Date: Wed Sep 20 07:53:25 2006

I leave it to others to read what you've written, Doug. And all I can add to
that is that I am not an engineer, but I can read English, and unless you
can show me an analysis of the functioning of the DMR's sensor that explains
how it is, in basic principle, different from all the other sensor's out
there, I'm afraid one has to conclude that even if your system works
brilliantly for you, it suggests that you are either losing a great deal of
data, or you have a metering problem. (And of course if your exposure
compensation takes care of that metering problem, then it doesn't much
matter how the sensor does or doesn't work, because you've got it working
for you.)



On 9/20/06 10:44 AM, "telyt@earthlink.net" <telyt@earthlink.net> wrote:

> B. D. Colen <bd@bdcolenphoto.com> wrote:
> 
>> i have no real world experience with the DMR, Doug
> 
> then you have no clue how it works or how to optimize its output.
> 
>> you somehow 'know' that the digital you're using is the best there is
> 
> Where did I write that, B.D.?  Show me the post where I claimed the DMR is
> the best there is.
> 
>> and behaves differently from every other digital camera out there.
> 
> And where did I write that?  I'm saying that it not behaving the way
> Reichmann or you believe it does. Apparently to get an optimum histogram
> you and Rechmann need to overexpose on the cameras you are using.  With the
> DMR I have to underexpose to get the same optimum histogram.
> 
>> If you don't want to believe that the world is round as Richman views it,
>> try checking out what Adobe has to say -
> 
>> http://www.adobe.com/products/photoshop/pdfs/linear_gamma.pdf
> 
> B.D. I'm not disagreeing with Adobe or with Reichmann' optimum histogram.
> I'm disagreeing with your blanket statement that underexposing with a
> digital camera gives you a 20% data loss.  That might be true on a camera
> that tends toward underexposure but not true on a camera that tends toward
> overexposure.
> 
> Are you even reading what I wrote?  You're arguing with things I've never
> written or believe.
> 
> Doug Herr
> Sacramento 
> http://www.wildlightphoto.com
> 
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Replies: Reply from jshul at comcast.net (Jim Shulman) ([Leica] PAW with some digital thing)
Reply from davison_m at msn.com (MARK DAVISON) ([Leica] Re: the dynamic range of digital)
In reply to: Message from telyt at earthlink.net (telyt@earthlink.net) ([Leica] Re: the dynamic range of digital)