From: Ken Paul Rosenthal (email suppressed)
Date: Mon Jul 20 2009 - 10:04:58 PDT
The simplest and most expedient test would simply be to lock your camera down on a tripod, choose a scene with a variety of light values, and shoot no more than 20 feet. The lab should (but check first) make you a 'clip test' for free. Hand processing has too many variables to assess something as (ideally) mechanically rigorous as a camera.
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