Originally posted by PentaxPZ Hi guys...
What is the usual culprate for noise in the shadows but in the light is good in the same photograph?
the picture below was taken at 1/2000 and F16 at ISO 3200 (my brother took the shot, I have the cam set to auto
because I rubbish at settings)
E.G.
The culprit is underexposure. In the example you've shown, you are starting with several stops of underexposure by using ISO 3200. If I am not mistaken, your camera has a native ISO of 200, so ISO3200 is 4 stops of underexposure right off the get go.
Normal exposure is calculated at 18% reflectance. Anything that reflects more than that falls into the overexposure range, anything under 18% falls into underexposure.
Shadows tend to be less than 18% reflectance, and so will be underexposure. Add a few stops more underexposure to your example, and you are in the 6-7 stop of underexposure for the shadows, with your highlights probably just reaching normal exposure
Noise is bound to happen in this condition.