Why 'more or less stopped using ISO'?

Started Feb 19, 2014 | Questions thread
Mark Scott Abeln
Mark Scott Abeln Forum Pro • Posts: 13,055
Re: Why 'more or less stopped using ISO'?

l_d_allan wrote:

I'm in the category of "not knowing that" ... about digital ISO being less than not very useful. Please clarify.

  • Is this specifically about "iso-less sensors" like many Sony and Nikon cameras?
  • So for such cameras ... just leave ISO at the camera's base ISO (typically 100)?
  • ...
  • Or does this also applies to Canon DSLR's (which I don't think can be described as iso-less)
  • Or because modern DSLR's have so little noise that use of Auto-ISO is appropriate?
  • So bobn2 and Iliah aren't concerned about what ISO is picked by Auto-ISO?

Boosting ISO usually decreases the dynamic range of the image, for all brands of cameras, although this is greatly influenced by the characteristics of your camera. Choosing exposure to preserve highlights, at base ISO, often leaves enough dynamic range in the shadows, which can be selectively brightened in post processing.

I don’t always use this process for two reasons:

  • Laziness.
  • Inability, at the time of capture, to see precisely what tones have been preserved well. 
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