Tony writes ... > On Sat, 6 Mar 2004 Michael Shaffer" wrote: > > ....... the dynamic range for negatives is said to be > > greater than for chromes, ... e.g., 11-13 f/stops versus 9-10. > > Michael > > Maybe veering slightly off-topic, but with respect, can you > give any references for this. I've also seen people stating > 14 stops for col neg on this list. I always thought transparency >could record 5 stops (32:1), B/W neg just over 7 (160:1), and > col neg 8+ (256+, more whenpre-flashed). Maybe > I'm confusing dynamic range with something else!
If you visit tha Scantips wwwpages, (e.g., see http://www.scantips.com/basics14.html ...), who has exposed his scanning tips to the film scanning newsgroup for years, ... even he is likely to confuse terms ... "optical density", "dynamic range", ... "dynamic range", "Photographic range". His numbers are as well more conservative than mine, and less than yours. He also explains the connection between OD and scanning bit depth better than I did, but I still haven't anywhere seen a good analogy which allows everyone to realize the relationship. If you google-search for ["dynamic range" film], you'll get many hits, including those who speak of theoretical limits of film, ... e.g., see: http://www.ltlimagery.com/dynamic_range.html hth 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
