Possible Duplicate:
What’s “real” and what’s “virtual” on a (digital) camera?
There are some things that can be adjusted in post-production (starting from RAW or JPEG) and some that have to be proper set when shooting. Some other things can be edited only partially in postproduction.
For example: in postprocessing I can blur my photo, but I can only partially focus the image, in particular the focusing should be done when shooting. The exposure can be changed in postproduction, but only with small variations without saturation problems.
Can you clarify what can be completely adjusted in postproduction, what must be perfectly set when I am shooting. Can you try to list them? For example what about white balance? Can it be completely corrected in post production?