I am currently using a 5d mark iii and I love it. I have AFMA all of my lenses. I use mostly the 24-70 2.8ii and the 70-200 2.8i and every once in a while the 85 1.2 ii. My issue is that when post processing my pictures the ones shot in landscape orientation look considerably better and are in focus better than the ones shot in portrait orientation. Is there something that could be causing this in the camera or is this most likely operator error? It wouldn't be a big deal if it was only occassionally but looking back at my past shoots the best pictures are always taken in landscape orientation. Thanks for all replies and insights.