Originally Posted by
j.e.simmons
You may be right, depending on your methods, but you probably are not. I have not found an SBR to equal a Zone or N. In my experience, they measure the same thing, but use a different scale. Also, if you read Phil Davis deeply, you'll find where he talks about how Zone placement makes a difference - if you place a scene on Zones III to VIII, for instance, you should develop differently than if you placed the scene on Zones II to VII, even though both measure the same contrast range.
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