Archived posting to the Leica Users Group, 2010/10/30

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Subject: [Leica] IMG: Roofers at 2500 ISO
From: hopsternew at gmail.com (Geoff Hopkinson)
Date: Sun, 31 Oct 2010 12:38:15 +1000
References: <AANLkTimLBd+r-paAxBmfyGqeUM2oNdVqoQCfX71z+11o@mail.gmail.com> <c2f43104afef294b0c518967627b5f64.squirrel@emailmg.globat.com>

That's easy. Its not so much the total mumber of photons in your bucket as
the signal/noise ratio. Sort of how much gin (good electrons) you put in a
glass with a fixed amount of vermouth (noise)

Sandy Mcguffog explains it very well as part of this article

http://chromasoft.blogspot.com/2009/09/why-expose-to-right-is-just-plain-wrong.html

Cheers
Geoff
http://www.pbase.com/hoppyman
NO ARCHIVE

On 31 October 2010 10:35, <afirkin at afirkin.com> wrote:

> > LUG:
> >
> > How about this for 2500 ISO?
> >
> > http://www.pbase.com/image/129908583
> >
> > <http://www.pbase.com/image/129908583>I don't think he'll ever guess the
> > camera was set wrong ;-)
> >
> > Tina
>
> Which begs the question: when there is a lot of photons out there, the
> high ISO looks fine, even though the "exposure" should limit the number of
> photons. Does anyone have an explanation?
>
> Nice roof, dangerous work
>
> Alastair
>
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>


Replies: Reply from afirkin at afirkin.com (afirkin at afirkin.com) ([Leica] IMG: Roofers at 2500 ISO)
Reply from tedgrant at shaw.ca (tedgrant at shaw.ca) ([Leica] IMG: Roofers at 2500 ISO)
In reply to: Message from images at comporium.net (Tina Manley) ([Leica] IMG: Roofers at 2500 ISO)
Message from afirkin at afirkin.com (afirkin at afirkin.com) ([Leica] IMG: Roofers at 2500 ISO)