Contradictory times in Mass Dev Chart

[darkroommike]

<p>Adams, his book is great on theory, but not so much on the practice of negative development.<br>

The Massive Development Chart times are all starting times, to be modified by the user. Many variables can modify that starting time. Processing method, use of a presoak (or not), lenses used (old non-coated glass produces lower contrast), illumination system of your enlarger and even the bellows of your camera (re: Adams), smaller bellows can produce more flare, in one of his books AA prefers a 5x7 camera with a 4x5 reducing back to lower internal flare when using lenses with excess coverage. All the Kodak TMax films, and Tri-X have old film and new film starting times published, since professional studios may have many bricks of the old emulsion still in cold storage. Note that TMax 400 exposed in daylight and TMax 3200 exposed at night will assuredly have different optimal developing times even if the published times match.</p>