Grant1120
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 p.1 #12 · p.1 #12 · Friday Night Lights - second season and my quads hate me already | |
"This may cause some arguments, but I'd be inclined to go down on the SS to help the ISO. Maybe 1/800 would be worth the tradeoff. Maybe not. Or maybe you've already tried and found it didn't work. Just a thought."
dkallmann - First let me be clear that I have no desire for an argument, however, I am keenly interested in a healthy discussion of this topic. I think we would both agree that a key objective is to lower the noise to the limit possible. This will be different with every camera body but the strategy to reduce should be similar. The effect of reducing shutter speed can lower ISO. If you can get the eyes/head in focus with no motion blur and are okay with motion blur on the extremities, slower SS are okay. I really do like some of those type shots. In fact, I went as low as 1/200 and panned and felt some of the shots were pretty good. However, I don’t feel lower shutter speed is a “sustainable” solution to reduce noise. More to my specific interest, is the concept of ISO Invariance. Without going into the technical details, it fundamentally says that as you increase ISO level past a certain point, the noise level increases and that noise is created “in camera” and baked into the image data. For the sake of discussion let’s say an image shot at ISO4000 has 10 units of noise and an image taken at ISO12800 has 35 units of noise. Let’s also assume the ISO4000 image is underexposed by 3 stops. Fundamentally, if you increase exposure by 3 stops in post processing you will increase the noise (3x10) to 30 units. On the other hand, the image “properly exposed” at ISO12800 needs no increase in exposure but it leaves the camera with 35 units of noise. In this example, the higher ss captures the image with no motion, and still delivers less noise in the final image.
So the idea I am trying to express and investigate in my own work is that ISO Invariance says that keeping the ISO level low (individual choice by camera) and keeping the SS high enough to stop motion will result in an underexposure that can be adjusted in post processing and will have less overall noise than a properly exposed image. The higher SS keeps my hit rate much higher and more consistent on the fast action shots which to me is the most critical factor.
Again, this is for discussion purposes.
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Sounds like a batch task 
