Originally posted by panoguy This feature of the K-7 specifically "corrects for lens distortion and lateral chromatic aberration" from DA and DFA lenses. The front or back- focus correction is still there, but that is different fro every body and every lens. The distortion and aberrations are consistent with the lens design (hence DXO makes a mint selling "specific lens correction kits").
Note: "lateral chromatic aberrations" are those pesky color shifts most noticeable in the corners of images. "Purple fringies" that appear at high-contrast areas with some lenses are not lateral, so won't be corrected I assume.
I would also assume that CA in out of focus areas will not be addressed, but what about vignetting? that could be useful?
On the whole, I think the real issue is that pentax does not want to go back and develop software to account for the hundreds if not thousands of past pentax lens designs, and why should they? but perhaps, they could leave a menu open, just like for focus, for users to inoput their own correction, assuming they have the patience to work it out.
something people need to think about, however, is that this may be the new way forward in lens designs, specifically to apply corrections in software. I would imagine this would simplify the optical design and lens complexity moving forward.