Exposure Basics, lesson three?

Started Mar 18, 2013 | Discussions thread
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richarddd
richarddd Senior Member • Posts: 2,982
Re: Quick correction.

Somewhat counter-intuitively, for fixed aperture/shutter speed, it is best to use the highest possible ISO (without clipping highlights) ... Read noise at high ISO is much smaller than read noise at low ISO, in terms of the error in photon counting that it represents. Thus, better image quality is obtained for using the highest ISO for which the signal is not clipped.

http://theory.uchicago.edu/~ejm/pix/20d/tests/noise/noise-p3.html#ETTR (paper written in 2008 and updated 2010).

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