Micro Focus Adjustment

[Pathfinder]

When you say you do this routinely, do you find the adjustments drift over time on the same lens/body combo or do you mean you do it for each new lens? Thanks.

I haven't been doing it long enough to tell if it drifts over time.

I do have a 300mm lens that, while quite sharp, required -19 AF adjustment to really bring out its best, and I am going to ship it off to Canon Factory Service for evaluation and correction. The largest adjustment on my 7D is - + 20.

That said I also sharpen and us the lens profiles in LightRoom and that is important as well, especially if shooting in RAW. You can have jpgs sharpened by the in camera rendering however you desire.

Remember, you can always compare the results of your camera's AF with the best you can do manually via LiveView and a 10X image - always do this on a tripod mounted camera of course

[Tucson T4R]

Let us know what you find with your testing. It will be interesting to see how prevalent front or back auto focusing is. I agree this is much more of an impact with long lenses shooting wide open.