Archived posting to the Leica Users Group, 2011/09/08

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Subject: [Leica] IMG: Learning to Use Histograms
From: philippe.amard at sfr.fr (philippe.amard)
Date: Thu, 8 Sep 2011 18:43:25 +0200
References: <97D0CBAD4B7646E0BBDCAE73974C4E25@jimnichols> <CA+yJO1CUvrACN3N7Y3XCWwoxia_j94z76gs_ZQ535HDaXYmTfQ@mail.gmail.com> <F3E3A41D-A169-49EB-8D85-0E0EABE72833@yahoo.com>

You let the black cat out of the camera bag now ;-)

Le 8 sept. 11 ? 18:34, Bob Adler a ?crit :

>
> Then key is it works best for scenes where the contrast doesn't  
> exceed the capture range of your sensor AND even if it does, you can  
> use it with caution (i.e., you should probably bracket).
> Good article as is the Reichmann article on luminous landscape:
> http://www.luminous-landscape.com/tutorials/optimizing_exposure.shtml
>
>
> Bob Adler
> http://www.rgaphoto.com
>
> On Sep 8, 2011, at 7:39 AM, Tina Manley <images at comporium.net> wrote:
>
>> I've been reading about histograms and found this very interesting:
>> http://schewephoto.com/ETTR/index.html
>>
>> ETTR - Expose to the Right for best signal to noise ratio.  I've  
>> tried it
>> with several experiments and it's amazing how much slight  
>> overexposure can
>> help with noise in the shadows.  There are other sites trying to  
>> disprove
>> ETTR but I've found it works for me.  Looks like that's what you've  
>> done
>> with this one, too.
>>
>> Tina
>>
>> On Wed, Sep 7, 2011 at 7:40 PM, Jim Nichols  
>> <jhnichols at lighttube.net> wrote:
>>
>>> My posting of the late Rose of Sharon image led to discussions on  
>>> the Oly
>>> list about proper exposure.  I have seldom used the histogram to  
>>> adjust
>>> exposure when making pictures.  I have used it as an indication of  
>>> proper
>>> levels in the post-processing of the image.
>>>
>>> I went out to try to find the best exposure adjustment for a  
>>> similar image.
>>> I ended up using EV +1/3 on the E-1 for this image.
>>>
>>> http://gallery.leica-users.org/v/OldNick/Improved+Histogram.jpg.html
>>>
>>> I now look forward to a sunny day (next week maybe?) to see if I  
>>> can find
>>> what works under those lighting conditions.
>>>
>>> Comments and critiques welcomed.
>>>
>>> Jim Nichols
>>> Tullahoma, TN USA
>>>
>>> _______________________________________________
>>> Leica Users Group.
>>> See http://leica-users.org/mailman/listinfo/lug for more information
>>>
>>>
>>
>>
>> -- 
>> Tina Manley, ASMP
>> www.tinamanley.com
>>
>> _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>




In reply to: Message from jhnichols at lighttube.net (Jim Nichols) ([Leica] IMG: Learning to Use Histograms)
Message from images at comporium.net (Tina Manley) ([Leica] IMG: Learning to Use Histograms)
Message from rgacpa at yahoo.com (Bob Adler) ([Leica] IMG: Learning to Use Histograms)