shAf writes ... ~~~~~~~~~~~~~~~~~ What you and Thomas say is true, but the sensors which scan (e.g.) film have to acquire linearly (maybe "linear" is the wrong term, but they're not flexible ... an analogy would be trying to measure 14 inches with a foot-long ruler). ... ~~~~~~~~~~~~~~~~~
I should clarify terms: Above, I refer to scanning "optical density", which is different than "dynamic range". For example, the dynamic range for negatives is said to be greater than for chromes, ... e.g., 11-13 f/stops versus 9-10. However, negatives don't require the same optical density, and negatives (and the dynamic range therein) can be scanned effectively with a 8bit scanner. This implies Bob and Thomas are correct! I only brought up an example of chromes because the dynamic range is contained in the optical density, and therefore the dynamic range cannot be captured with an 8bit scanner. It's just a question of terms, and I only wanted to make note of an exception. cheerios ... shAf :o) Avalon Peninsula, Newfoundland www.micro-investigations.com (in progress) =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
