----- Original Message ----- From: "Peter Lacus" Subject: Re: beauty shot: Pentax K10D- 17mm lenses are out there
> Bill, > >> DSLR cameras are showing 10 stops or more of dynamic range, which is >> about 3 >> stops more than that of print film, probably 5 stops more range than >> slide >> film. > > IMHO there's only one definitive truth - film emulsions react to the > light in a different way than linear digital sensors. Indeed it's much > easier to extract useful data from digital RAW files but does it prove > that digital sensor captures wider dynamic range? IMHO it proves that > current scanners are not capable of extracting data from the film more > than anything else. I'd have to dig out my charts from when I was learning the Zone System, but my recollection is that I was never able to get more than 9-10 stops out of B&W film without going to very exotic processing methods. My experience working as a QC technician in the photo lab industry indicated to me that print film, when measured on a densitometer, was incapable of givng more than 7-8 stops of dynamic range. My observations were not dependant on scanner limitations or paper dynamic ranges, but on direct measurement of film samples using a device designed specifically for that purpose. William Robb -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
