Originally posted by BakDinitzen ad more sharpening to my wall, and it definitely improved the result.
With ALL mainstream consumer dslr cameras you have to sharpen the output - the low pass or "AA filter" slightly blurs detail so you don't get moire, which is a PITA to remove/reduce in PP.
Brick walls are terrible subjects for sharpness testing, sometimes they aren't completely straight, sometimes they are but the lens has field curvature: just about every lens has it to some degree and that can make lenses look softer in the corners than they really are. I consider the best way to test a lens it to actually do some photography with it, use the lens at all focus distances, see how the lens handles flare by including the sun in your composition - do things like that. Brick walls can only tell you so much, usually how good the people who built your house are. Tests only have meaning when they are done properly and with high precision when the results are repeatable and empirically observable.
By the way: I think it is time you pruned your roses.