HR-scan are by lines, not by mb(which depends on color-info).
They do 16-base roll-scan(complete roll, uncut) at 1920x2880lines(eqv.to 5.5mPixel) and full 3600x5400lines(eqv.to 19.4mPixel) for selective frame-scan.
Files are in jpeg though; u may enquire on tiff beforehand (but beware of the overly-large filesize).