The question is - how much DR has such a landscape scene as you describe and how much DR is really useful/necessary for real life applications. To give you a driving analogy - my car has 125 HP engine and it serves all my needs. Evidently the hot hatch with twice that power will be fun to drive but will it be useful/necessary? Likely there will be cases when 250 HP will have its uses, but just as likely it will negligible number of times, unless one is doing some extreme driving or racing, whereas while we talk daily commute cars, 125 HP is more than enough.
On Sun, Nov 7, 2010 at 8:26 PM, Adam Maas <[email protected]> wrote: > At low ISO's yes to some extent. It depends on what you photograph. > Ralf's work is a DR torture test but even a normal landscape scene can > easily exceed 14 stops of DR if sunlit and having any deep shade. > > -Adam > > On Sun, Nov 7, 2010 at 1:23 PM, Boris Liberman <[email protected]> wrote: >> So, Adam, /in principle/ or /in general/ what you say is that unless >> one is doing some very special kind of photography such as what Ralf >> is doing with so much success, the difference between K-5 and K-7 will >> be (very?) subtle and hard to see. The difference in DR will be less >> profound due to the specific tuning of the metering of each camera and >> also, as far as I understand, the ultimate test of print or photograph >> on computer display will result in much more similar results than it >> might seem from the mere spec comparison of these cameras. And more so >> if one is doing relatively simple and relatively mild post processing. >> Is that so? >> >> On Sun, Nov 7, 2010 at 8:18 PM, Adam Maas <[email protected]> wrote: >>> On Sun, Nov 7, 2010 at 12:46 PM, Boris Liberman <[email protected]> wrote: >>>> Hmmm, so a camera with so many bits of RAW can do what then? Discern >>>> 2^so many shades, right? >>> >>> Exactly. >>> >>>> And the dynamic range is about when it goes >>>> to saturation either to pure black and pure white. >>> >>> Pure white and indistinguishable from noise (not pure black). The >>> noise floor determines the actual dynamic range's low end. >>> >>>> Ok, so tell me >>>> then, the wise people of PDML, is there a way looking at the same >>>> picture shot with K-7 and K-5 to tell them apart? Or better yet, how >>>> do I /see/ that one camera has wider DR than the other and that more >>>> BPS in RAW are more beneficial than less BPS in RAW in real life. And >>>> how all that translates to actual print? >>> >>> The bit depth of the RAW files shows up in subtle gradations of colour >>> and in shadow noise. You get more subtle colour/tone resolution and >>> less shadow noise with a higher bit depth ADC than with less (the >>> shadow noise improvement is due to exactly how ADC's work with linear >>> imaging sensors, you lose luminance resolution at low luminance >>> values. Digital delivers superb resolution of bright tones and poor >>> resolution of dark tones). In the real world, shadow noise is the >>> easiest to see, especially on a camera which can shoot in both 12 and >>> 14 bit modes like many Nikons. >>> >>> More dynamic range allows you to make less trade offs in exposure at >>> shooting time. The more DR you have, the more you can hold detail in >>> both the highlights and the shadows at the same time. The downside is >>> the self-same image will be lower contrast when rendered and you >>> usually have to make those trade offs in post instead. >>> >>> >>> -Adam >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> [email protected] >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >>> >> >> >> >> -- >> Boris >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> > > > > -- > M. Adam Maas > http://www.mawz.ca > Explorations of the City Around Us. > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- Boris -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
