It's actually 3.4:
Originally Posted by bdial
The difference may not sound like much. but it does matter - a scanner with inadequate dmax will simply not render highlight detail in b+w negs properly (if at all) and conversely is likely to produce lots of artefacts in scans of the shadows of full-blooded prints.
Also, as a guide: I have a Nikon Coolscan IV as well as an Epson Expression 1680 flatbed. I find the Coolscan (dmax 3.6) works well with color transparencies even when these are slightly underexposed for good saturation. It also works well with correctly exposed and developed b+w film - if b+w negs have been overdeveloped, however, the Coolscan really starts to struggle. This is why I recommend a dmax figure of 3.6 as a minimum.
Last edited by David H. Bebbington; 02-25-2008 at 08:13 PM. Click to view previous post history.