Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@y..., Todd Flashner <tflash@e...> 
> What determines where the endpoints of a RAW highbit scans (no tonal
> manipulation by the driver or image editor, and no profile assigned) get
> written to Photoshop's histogram in 16-bit mode? In other words, why does it
> appear to be of such low dynamic range, and bunched into the dark end of the
> histogram? If you scan a chrome which has a dynamic range of 3.7 on a
> scanner which has a true dynamic range of 3.7, why wouldn't the data span
> the histogram? It would still be bunched up.

Simple answer; because you are scanning into a 16bit space and the 
scanner is not 16bits. That 3.7 worth of information is linearly placed 
along the 16bit histogram.

-mike