Okay, this part is only for those who have been using
Camera Raw in previous versions of Photoshop (CS4, CS3, and so on),
because if this is the first time you’ll be using it, this won’t affect
you at all, so you can skip this. Here’s why: in Photoshop CS5, Adobe
dramatically improved the math behind how it processes noise reduction,
sharpening, and post-crop vignetting for RAW images. If you have RAW
images you edited in earlier versions of Camera Raw, and you open them
in CS5, you’ll have a choice to make.
Step One. | When
you open a RAW image in CS5’s Camera Raw 6 that you previously edited
in Camera Raw from an earlier version of Photoshop (like CS4 or CS3),
you’ll see a warning appear in the bottom-right corner of the Preview
area (actually, it’s an exclamation point, shown circled here in red).
That’s letting you know that your image is still being processed using
the old Camera Raw processing algorithm from back in 2003, but you have
the option of updating the image to use the new, improved processing,
called “Process Version 2010.”
 | Step Two. | To
update your previously edited RAW photo to Process Version 2010, you
can either click directly on the exclamation point warning (which is the
fastest, easiest way), or click on the Camera Calibration icon (it’s
the third icon from the right at the top of the Panel area) and choose 2010 (Current)
from the Process pop-up menu at the top of the panel (I’d only do it
this way if I was charging by the hour). Now, if your image didn’t have
any sharpening applied, or noise reduction, or post-crop vignetting,
you’re not going to notice a change, but if it did, you’ll be amazed at
how much better it looks now.
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