Thanks Bob, That makes absolute sense to me. Back when the adage was expose for the shadows/develop for the highlights with film I understood and used that process. Now with digital we hear ETTR (expose to the right) which places the emphasis on the higher values just short of clipping so the shift with digital is higher in the zones regardless. It also explains to me why RAW images SOOC seem flatter in contrast than the corresponding JPEGs before we use our PP programs. Thanks so much for the clarity on this topic. Pat
rmalarz wrote:
Pat, you're correct in the Zone concept. With digital white is the important Zone for which to meter. The darker tones are handled in processing. Now, if we consider that the digital tonality is 256 steps, it's difficult to divide and get 9 or 10 discrete zones. Zone 0 is values of 0 to 25.6, Zone I is 25.6 to 53.2, etc. We don't have discrete values on which to rely and say this value is Zone i. The all important thing is to know how many stops additional exposure one can set but not blow out highlights. Specular reflections can get to Zone X or 256.
So, when I'm shooting digital, I'm placing the highlights, not the shadows, in the Zone I feel appropriate for the scene. Then in processing I handle the lower portion of the Zonal placement. It's almost 180 degrees different than when I'm shooting film. However, when I'm shooting film, I rarely place shadow, even the darkest shadows in Zone 0 or Zone I. I generally place them in Zone IV. Obviously, this does require one to test their camera to see how much additional exposure can be utilized. This varies from camera to camera, not model to model. As such, the first few days of my using a new camera will spent photographing a color chart, with various lenses, to see just where the camera's limits are.
I hope this answers your question. If not, let me know.
--Bob
Pat, you're correct in the Zone concept. With digi... (
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