I think you have some missconceptions, perhaps this will help:
Originally posted by nanhi And anyway you can't change the following in RAW:-
Shutter speed: the duration of the exposure is fixed the moment you press the shutter – you can’t change that later!
Lens aperture: lens aperture and depth of field are also fixed at the moment the shot is taken
Well, you can´t change Tv and Av values in Jpeg either! Those are THE values one must decide on the camera and lens respectively.
Originally posted by nanhi Zoom setting: you can crop your pictures later, but you can’t alter the physical zoom setting you chose on the lens
Actually, cropping an image gives the same result as using optical zoom. The difference is in that you loose resolution with the former method...
What you can´t change is perspective, by moving closer or further from your subject.
Originally posted by nanhi Focus distance: the focus point is another optical property that can’t be changed later.
With modern software, you can correct missfocused shots nowadays... I think it applies equally for Jpegs or RAW files.
Originally posted by nanhi SO: the ISO is applied using electronic amplification before the raw image is created – surprisingly, this is not a raw option either so it’s something else you have to get right when you shoot.
Take into account that the K.5 uses analog amplification for ISO values 100 through 1600. After that, ISO is achieved by digital amplification.