Is there an optimum number of shots to take for HDR? In the past I have used 3 shots, usually 2 stops apart, but I have noticed that some folk use more and some are only 1 stop apart.
Does it really matter how many shots and how many stops apart they are?
I started HDR with my D70 which shoots at 2 stops apart, so I did 3 shots, 2 stops apart. -2, metered, +2.
Then I got my D200, which can shoot 9 shots in a bracket, but at only 1 stop apart.
Most of it does come down to the camera. Some cameras have 2 stops, but less shots. Some have 1 stop, but more shots.
Thats what I think anyways.
I know that the whole point of HDR is to capture the whole dynamic range of a scene and that you would expose for all the extremes of the scene, but there must be an optimum. Does anyone know?
Personally, speaking from relative experience, I think it all comes down to the individual scene.
I've done HDR's from 3 shots that looked fine, but I've done 3 shots that looked bad, where I needed 5 or 7 to make it work.
I find sunsets the hardest for HDR, as you do need a much wider range. Only way to really tone it down is using a ND grad at the same time.
I think my widest HDR was about 23 shots, and that was more personal taste then anything. I wanted to blur the movement, and I wanted it to bring out more tones.
Normally 3-7 will work fine. Sometimes you'll need a bit more, sometimes 3 is completely adequate.
Best bet is to just experiment with it under different scenarios, and see how a 3 shot HDRi compares to a 9 shot HDRi of the same scene.
Hope that helps a bit.
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