Archived posting to the Leica Users Group, 2006/09/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]B.D. I'm not trying to muscle in here, and I've never used a DSLR. I really want to understand better. I don't follow your reasoning, here. I'd read that article before and reread it on your post. It seems to me that it supports what Doug is saying. By slightly underexposing, are you not helping to preserve detail in that first lightest stop which has the most information? Then you can adjust the tonal range later but you must preserve the detail in those highlights, those that aren't specular? Isn't Doug's approach going to preserve more tones in the highlights and potentially lose less in the shadows? That is lose much less information because of the linear performance of the sensors. Now just how much of that information you can actually reproduce in a print, either near pure white or black is a different issue. As a practical matter your system obviously works for you and Doug's for his subjects. There are clearly other factors at work. I'm looking forward to learning more. Cheers Hoppy -----Original Message----- From: lug-bounces+hoppyman=bigpond.net.au@leica-users.org [mailto:lug-bounces+hoppyman=bigpond.net.au@leica-users.org] On Behalf Of B. D. Colen Sent: Wednesday, 20 September 2006 12:58 To: Leica Users Group Subject: Re: [Leica] Re: the dynamic range of digital Being the digital expert you are, Doug, I would have thought that you'd know that by under exposing a stop, you're throwing away everything at the top end of the range - in the highlights - not the shadows - and 20% of the data is in that top stop. But I don't use a DMR, so of course I know nothing about digital ;-) - so don't listen to me, but do try reading this...from the Luminous Landscape site.... http://www.luminous-landscape.com/tutorials/expose-right.shtml > In my experience with the DMR, setting exposure comp to -.5 or -1 > sacrifices very little deep shadow detail if any. It's not what I'd > call a 20% loss of data. The histogram (yes it's RGB) is nowhere near > clipping at either end aside from specular highlights. Perhaps B.D.'s > 20% estimate is based on his experience with the E-1? > > Doug Herr > Birdman of Sacramento > http://www.wildlightphoto.com > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information