Achieve consistent tones in a series of prints

Martin Jones

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I want to create a set of prints of a scene from different negs shot a the same time that have the same, or at least very similar, tonal values in key areas such as the sky. The aim is to create a coherent set of prints that can viewed together without jarring differences in their tonality. Using my Mk1 eyeball is probably going to be very error prone. Assume that all negs are shot in similar lighting conditions.

I'm looking at an empirical method to record the tonal values in the first print and try to achieve the same value in the other prints in the series. My initial thought was to write down the brigthtness/contrast values from Viveza that I use for the first print, (when happy with the results), and apply these to the other images. Notwithstanding any detailled CG adjustments that may be required. Is there perhaps a method within native PS that I can use to record scene tonal values for subsequent use in following images.

If you can follow what I'm trying to achieve can anyone give any recommendations?

TIA
 
Try applying a total blur layer that takes out all definition, then take a reading from that, if you see what you mean.
 
Almost like an average meter reading? How would I take a reading from that? I'm currently a very unsophisticated PS user, (up until a week ago I used Spot Healing and Clone stamp to tidy up negs and then apply global settings like Auto Levels and Auto Contrast to get a final image. It's shocking, I know!! I will improve now that I have come into this knowledgeable group. Thanks Martin H and Ian B.
 
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