I just came back from a trip to the park with my 1 year old who started walking. I used my Canon 85mm 1.8 along with my 6D. Sad to say, a good amount of my images were blurry or out of focus, the ones that hit really hit. I am trying to figure out if its my technique or my lens needs AFMA.
-I was shooing Av mode, Aperture of 5.6-8. Auto iso. max of 6400. Shutter speed for lots of images was 1/125 (my minimum shutter speed for Av), and AI servo mode while holding back button focus close to his eye.
-My sharpest image is the first image. Posted, settings of F5.6, 1/160, Iso 125
-Second image is similar to most of my softer images, Image settings are F8.0, 1/160, Iso 320
So in regards to the second image, Is the difference due to Iso 125 vs 320? Is everything fine but my subject keeps moving so I should try 1/250-1/500? Is AI servo causing an issue using non center focus point (6D is notorious for its great center point but not so great other focus points), or is my lens just front or rear focusing?