Duane, A typical LCD has a maximum luminance these days of around 250 cd/m2, but usually adjusted for ideal photographic image display LCD¹s are choked down to between 150 and 180 cd/m2, with a black point between 0.05 and 0.09. CRT¹s after calibration and profiling will have a luminance range from 0.07 to 0.90. A fine print¹s density range is much closer, ideally slightly more measured with a densitometer than the range of a CRT, but very much less than the range of an LCD. However, on a perceptual basis because a print is viewed by usually less than ideal illumination (diffuse) the perceived tonal range is even closer to that of a CRT because the CRT display is projected rather than reflected light (unless contaminated by high levels of ambient illumination). Additionally the standard 2.2 gamma setting for displays produces a very different midpoint gray value between a CRT, which closely matches a print midpoint gray, compared to an LCD which with its longer luminance range has a much brighter midpoint gray. So far as I know Barco is the only LCD offered which has a gamma correction function that adjust for this midpoint gray discrepancy. Regards, David B. Brooks Shutterbug Magazine E-mail: fotografx@... On 10/15/04 11:34 AM, "dlruckus" <dlruckus@...> wrote: > > David, > > One would think that the flat panel LCD screen would be just the > opposite and be closer to paper than the CRT. That has been my > experience to date but perhaps I'm missing the most recent advances in > that field. > > Best. > Duane > > > > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "David B. Brooks" > <fotografx@m...> wrote: >> > >> > Bernie, >> > >> > May I suggest that ³color management² and monitor calibration and > profiling >> > could at least reduce the discrepancy between what you see on-screen and >> > what you obtain in a print even though you are working with > grayscale and >> > not color. I have jumped in here in part because I was just delivered >> > ColorVision¹s new Spyder2Pro colorimeter and software, and the resulting >> > calibration and profiling I am now obtaining is amazingly > well-matched and >> > the screen gray is at a neutral balance I¹ve not seen before. And > may I also >> > suggest that with an LCD flat panel, its grater brightness range > compared to >> > a CRT, makes it that much more difficult to obtain screen matching > in prints >> > as there is an inherent gamma discrepancy. CRT¹s are much closer in >> > brightness range and apparent gamma effect to a print density range. >> > >> > Regards, David B. Brooks >> > Shutterbug Magazine >> > E-mail: fotografx@m... >> > >> > >> > >> > >> > On 10/15/04 4:17 AM, "Bernie Ess" <albatros-@...> wrote: >> > >>> > > >>> > > When I started b&w printing on an Epson, I thought one of the >>> > > advantages over the darkroom was that once its well set up, there >>> > > would be no trying and experimenting and that I would have 100% >>> > > predictable results. >>> > > >>> > > Now, a few hundreds or probably thousands of prints later I find that >>> > > this is >>> > > not exactly the case. On my 2100/UT7 workflow I find the following >>> > > issues: >>> > > >>> > > 1. My output from the file + Roark curves is roughly, but never >>> > > exactly what I see on my monitor. When I look at the grayscale on my >>> > > flat panel the 100% to 0% >>> > > steps are quite well separated, but in the uncorrected print the deep >>> > > shadows (around 95% >>> > > black) are not well resolved, 95% comes out totally >>> > > black: So I had to make a curve that boosts the deep shadows. >>> > > >>> > > 2. I often find myself having to do several prints of the same photo, >>> > > because the general "look" of the print is not like on the screen, see >>> > > also my other message about the foliage and trees. >>> > > >>> > > 3. The most mysterious thing is that my output seems to vary from time >>> > > to time. Sometimes I find the prints too dark compared to the screen, >>> > > sometimes they are slightly too light. >>> > > >>> > > Finally its not that different from the darkroom, I would say >>> > > gradually more predictable (maybe even by a large margin, but that is >>> > > probably because my traditional darkroom skills are so poor). >>> > > >>> > > So, do you have a 100% WYSIWYG workflow? >>> > > >>> > > Thanks for your input, >>> > > >>> > > Bernhard >>> > > >>> > > >>> > > >>> > > >>> > > >>> > > Please visit the Group Homepage to check the Files, and other > resources as >>> > > they are often being updated. >>> > > >>> > > http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint >>> > > >>> > > If you wish to receive no emails or just a daily digest, or you > wish to >>> > > unsubscribe, please edit your Membership preferences by visiting > this same >>> > > page. >>> > > >>> > > Please follow these basic guidelines: >>> > > - As threads develop, trim off excess portions of earlier messages > to keep >>> > > them short. >>> > > - Good manners are required at all time. 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Message
Re: [Digital BW] How reliable/ precise is your b&w print workflow?
2004-10-15 by David B. Brooks