Handheld with the much reviled Sigma 24 f/1.8 and 6D...obviously there's not much landscape involved in this shot (like many of these I've posted, it's from my front yard). The sun had set 20 minutes or more, before the shot...getting into the tricky "blue hour". Yet I managed to do ISO 100 at f/10. I really need to only shoot this lens at f/8 or wider, and worry less about the corner sharpness. Even though the color and contrast via this lens can be a little muted, that's easily overcome in post. Shooting stars and milky way at wider aperture is requiring a bit more post work due to what looks like a combination of astigmatism and coma at extreme side borders and much of the corners. But all of that goes away past f/5 or so, though. Also the AFMA varies all over the place...and the AF motor is loud and "old tech"...but I still like the lens.
Anyone have any comments on how good LR 4 and 5 are at getting rid of CA? I like to just click the one "checkbox" and most of it magically disappears. But are the sliders below that meant more for longitudinal CA? If you adjust them say below 5, they seem to help the lateral CA a bit more (than the "checkbox" does). But going higher than that, they skew the color edges by a large amount (which seems like it would help more with longitudinal CA, or "bokeh fringing").
In CS5 the amount of control over lateral CA is even greater, but it can take more time if you really start fiddling with sliders. I don't have CS6...will probably wait for CS7.