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

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Subject: [Leica] IMG: Learning to Use Histograms
From: rgacpa at gmail.com (Bob Adler)
Date: Thu, 8 Sep 2011 14:02:37 -0700
References: <97D0CBAD4B7646E0BBDCAE73974C4E25@jimnichols> <CA+yJO1CUvrACN3N7Y3XCWwoxia_j94z76gs_ZQ535HDaXYmTfQ@mail.gmail.com> <F3E3A41D-A169-49EB-8D85-0E0EABE72833@yahoo.com> <p0624080cca8ec9b0ea36@[192.168.1.104]>

Glad you liked Herb. I discount most of what this guy writes but this one 
seemed good. 
Best,
Bob

Bob Adler
http://www.rgaphoto.com

On Sep 8, 2011, at 12:37 PM, Herbert Kanner <kanner at acm.org> wrote:

> 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!
> 
> _______________________________________________
> 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)
Message from kanner at acm.org (Herbert Kanner) ([Leica] IMG: Learning to Use Histograms)