Wow! But I think, even the black crushed shadows of Velvia aren't that deep. A Tango scanner doesn't boast that number and it's a reference. For normally exposed slides, the useful D-Max is probably around 3.0D. Iliah Borg wrote on 18.01.16 20:15:
4.2D corresponds to 4.2*log2(10) = 14 stops.
On Jan 18, 2016, at 2:07 PM, Paul Schilliger wrote:
Nice detail and useful tip. How many f-stops would correspond to a density of D0 to D4.2, which is the number of high-end scanners if I recall?
Kind regards Paul Schilliger
Iliah Borg wrote on 18.01.16 19:54:
CMOS have evolved, as well as software, and together, with fully coated lenses designed for digital cameras, they master flare and glare quite well To 11 stops linearity, if the lenses and sensor are sterile clean, and camera chamber does not bring flare like some D750 Nikons do. -- Best regards, Iliah Borg LibRaw, LLC www.libraw.org www.rawdigger.com www.fastrawviewer.com