Dear Bob and list: Forgive me for going on about this again, I just have to make my point...
> but adding more bits doesn't change the threshold of the > device. Correct, but adding more bits does influence the number of subject brightness levels in f-stops we can record. Here's what I mean: Take a fully saturated pixel of any bit depth. Let's say it has a full-well capacity of 90,000 electrons. Now, divide this number by a factor of 2 and keep halving the remainder. Each division represents one bit or one half the light, until you reach the noise floor. (It's here where good data is polluted by random "noise" from the electronic circuits and/or sources of heat within the device.) Surely it's obvious a 16-bit device can record more f-stops of subject information than an 8-bit device? This is the point I have been attempting to make! Shooting outdoor scenes in high-contrast Aussie light with a 16-bit device records everything with detail as long as I expose for the highlights. Actually, I need to add image contrast to make the result look more photographic. Sorry for the long rant. Best regards to all, David =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
