> A 22-bit quantity is 'measuring' to a precision that doesn't exist; > at that level of detail the voltage isn't a smooth, continuous curve.
It may be I'm not into electronics enough to argue about that. However the thing about the 22bit (18 or 20 being enough? how could we know) is indeed to have a high enough definition not to lose to much in calculations. Of course it is clear to me that if all the camera had to do was: * read the analog signal * convert it to digital * write it in a RAW file. Then 22 bit is way overkill. But I really don't think it works that way. Specialy if you need JPEGs (and if you don't the camera can do it so it is important). As a stupid example (but still applicable IMO), find a old very simple calculator write 1 and do whatever calculation forcing in to use a lot of floating point numbers. Then do exactly the opposite calculation. Wanna bet you want get 1 as answer? The difference between 1 and what you got is **lost** information and you can do nothing to recover it, except thinking about it before and try to have as much figures pas the the point as possible to minimize the ammount of lost informations. > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- Thibault Massart aka Thibouille ---------------------- *ist-D,Z1,SuperA,KX,MX, P30t and KR-10x ;) ... -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
