Just wanted to follow-up nd update my experience with my canon 70D and the center square focus issue that I (and many others) have had. as I noted eaelier - I tested my lenses as per canon's directions with about 6 different lenses, carefully following the directions, and the lens was front focusing with every single lens to the point that the micro adjustments offered in-camera were not near enough, not to mention that it wasn't consistently doing the same amount every time, with every lense at all apertures.
Canon told me to send it in, and I did - got it back recently and it seems like they fixed it -fingers crossed. i tested it with every lens i have, and while there is still some degree of front focusing on a number of lenses, some are close enough to be on that i won't need to worry about them, and a few i will micro adjust.
dealing with Canon is a different story all together; very frustrating - the local dealer advised me to send it through them, which i did. the day it arrived at canon, i called them to see about turnaround time, etc, and they were very snooty and would not give me any info saying that I should have sent it in directly to save time, and since i didn't, they would not give me any info, but deal only with the store that sent it for me.
frustrated, i called back a couple days later to see if there was any way to get some idea of what they would or were doing, and when it would be finished. I talked to a guy that was actually nice and helpful, who, after advising he couldn't give me any details, told me they had "checked the firmware" and cleaned the sensor and restested, then sent it back. the store that sent it for me got no details, in fact they got less info then I did, and i was told I would not get any details.
I am cautiously satisfied with the warranty work, keeping my fingers crossed. I absolutely love the overall package of the 70D - the features, the build quality, the specs, all of that, but the whole center square focus issue has really left me with a lingering bitter taste in my mouth. I considered just selling my used 70D and buying the 7D mk2 or the 5d mk3, but everytime i did, i thought, "what the heck am I doing? the 70D is 'enough' camera for my hobby/enthusiast needs" and really, I prefer the touch screen of the 70d over the dual sensor of the 7D anyway.
to be honest, if I had it to do all over again, I think I would take the aproximately $7,500 i have spent in the last 15 months for my complete kit and invested it in a mirrorless system, and avoided canon and the 'other' big camera company all together. now, I am locked into canon unless i decide to sell out at a substantial hit, which in fact goes through my mind often.
