Originally posted by Chris Mak There has to be a reason to provide a menu option to disable/bypass the accelerator chip, a proud Pentax/Ricoh development. They mean to distinguish their camera's IQ wise with it, so not likely to put any effort in enabling a few that want rough raw to switch it off.
The reason some might give - and potentially with merit - is that
any cooking or processing of RAW data means you're tied to the manufacturer's interpretation of the "best" way to handle noise and other image data provided by the sensor. Such processing is designed to appeal to a very wide audience, but that means it may not (probably won't) be ideal for everyone. Of course, what you don't know won't kill you
Originally posted by Chris Mak But to actually discover whether you would in practice even use the option to disable/bypass the accelerator chip, why not shoot a K3 next to a KP, and look for benefits of the K3 iso 1600 or 3200 shots.
Absolutely. Of course, a wide range of test shots needs to be taken in order to stress test all aspects of the processing carried out by the accelerator... A night sky full of tiny stars is going to have different demands to an indoor rock concert, or landscape at dawn...
Originally posted by Chris Mak Raw for the sake of "raw" is not a strong argument.
It potentially is, though - depending on the varied needs of the photographer, and the results of the multiple tests I refer to above