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

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Subject: [Leica] IMG: Learning to Use Histograms
From: kanner at acm.org (Herbert Kanner)
Date: Thu, 8 Sep 2011 12:37:23 -0700
References: <97D0CBAD4B7646E0BBDCAE73974C4E25@jimnichols> <CA+yJO1CUvrACN3N7Y3XCWwoxia_j94z76gs_ZQ535HDaXYmTfQ@mail.gmail.com> <F3E3A41D-A169-49EB-8D85-0E0EABE72833@yahoo.com>

Great reference, Bob. Every one here who uses a digital camera should 
read and reread that article until everything said in it is crystal 
clear.

Herb


>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

-- 
Herbert Kanner
kanner at acm.org
650-326-8204

Do not meddle in the affairs of cats,
for they are subtle and will pee
on your computer!


Replies: Reply from rgacpa at gmail.com (Bob Adler) ([Leica] IMG: Learning to Use Histograms)
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)