Sometimes it is dark. And yet you need to make it look light, like this, from last weekend’s christening shoot:
I shot that with a 50mm f/1.2 lens, at these settings:
- 1600 ISO, f/1.4, 1/100th second
- And then I had to push it in post-processing (and remove the resulting noise)
So imagine. At f/2.0 that would have been 1/50th sec, and at f/2.8 barely 1/30th second. Which is too slow to avoid motion blur. And worse, many of them I had to shoot at 1/30th second. That would have been 1/8th sec at f/2.8 – not doable at al.
The lesson: some situations are really really dark, and if you cannot use flash (either because you cannot bounce, or because you are not allowed to use it) you have to either go to very high ISO values (like 3200 and above), or use very fast lenses, or push process. Only fast lenses and flash do not affect quality.
- Push processing
- High ISO (1600 and beyond, depending on the camera)
Do not affect quality:
- Flash (except light quality)
- Fast lenses (except depth of field)
So… I love fast prime lenses, and now you know why.