How low, should I go, on the max ISO?

Started Oct 24, 2014 | Discussions thread
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cm71td Regular Member • Posts: 464
How low, should I go, on the max ISO?
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Some background:

With a D4, when I shoot indoor theater or dance with rapidly changing lights I typically setup the following:

  • Shutter priority (I will often change the shutter speed depending on how fast things are moving on stage in order to get as much light as possible).
  • Auto ISO
  • Raw with post processing in Lightroom.

The camera will set the lens to the max aperture and raise the ISO as needed.

I previously used max 12,800, as I feel that is the highest ISO with acceptable quality, but now I'm thinking that is foolish, as I believe that the D4 becomes "ISO less" at a much lower ISO threshold. (Correct my if I'm wrong)

In other words: At the same shutter speed and aperture, an "underexposed" ISO 6400 pushed a stop in post processing will look no different than a 12,800 from a noise perspective . So I'm risking blowing out the highlights for no reason.

Question: How much should I lower the max ISO? In other words, at what point does the D4 become "ISO less".

Nikon D4
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