On Dec 12, 2006, at 8:52 AM, Cory Papenfuss wrote: >>> OK so camera sensors are actually capable of producing colors >>> outside >>> of AdobeRGB. But when the cameras write the data in RAW files on the >>> cards, all this gets clipped/compressed/transformed (insert correct >>> term here) to AdobeRGB. >> >> No it doesn't. >> It doesn't get converted to *any* other colorspace until you do RAW >> conversion. >> > What about the K10D's 22-bit -> 1[246]-bit(?) lossy conversion to > RAW? Somewhere in the signal chain the camera's processor decided to > throw something away.
The 22bit quantization of the analog signal presents a more accurate reflection of photosite voltage levels. Subsampling that to 12 bit representation afterwards is always going to be a more accurate representation of the sensor capture than using smaller quantization space for the A->D conversion. All conversions have some loss associated. The goal is to minimize the losses. Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
