Originally posted by RobA_Oz My understanding is that RAW data isn't quite "straight off the sensor". If that were the case, I imagine all RAW files taken with the one camera would be of equal size.
This is controversial, Rob - to me at least, even if others go 'meh'.
I'd be happy if it was left up to the RAW developer software to do everything from the original captured data.
But my guess is every manufacturer alters the data and has some justification for it.
I would rather a camera didn't do distortion, noise reduction, sharpening, lightening the corners to offset vignetting, etc, because these are lossy procedures that restrict how much more you can do in Photoshop or whatever. m43 style lenses even have tables in them telling the camera what weaknesses the body will have to overcome.
I would rather the computer gave me optional lens profiles, rather than a camera spit out pre-cooked RAWs that are defacto JPEGs, but others will disagree.
It's hard to work out who does what, but some brands obviously do it more than others, and the Pentax lens designers have said they prefer not to go far down this modern road.