still remember those days before i was making a final decision to buy my canon 7d, went on internet to do bunch of research. what i got were number of complains on canon 7d focus problems. there was a little hesitate about making a final call, i decided to go to best buy and tried it myself before pulling a trigger. i ended up buying canon 7d with carrying a thought...
1. if there was focus problem found, then i would return it,
2. buying canon 7d will save the quite a bit of money for coming canon 5d mark iii
now, i am still using it without any problems so far. however, there was a time that i had focus hunt problem with canon 7d, that was the time when i was trying to focus on a humming bird:
1. In a frame with bright sky and bird was relatively kinda small in the frame,
2. With single focus point,
3. Full range of zoom, on canon 70-200mm is mark ii, was set
why was that? setup and try to see where is the problem... however, there is a easy test on this... have one person sitting by a window that lit up with a bright light, try to focus on that person to see how fast and how accurate you can nail the focus...
disclaimer: i am not a pro. nor a person who has used slr for 20 years. i am just a hobbyist sitting at home learning digital photography after working hours (yes, sometimes during work hours too lol...). my main target now is post processing, but still not forgetting about practicing everyday... sometimes with camera, sometimes with thoughts
changing a brand is not a choice to me since i do believe that if someone can deliver a good image with my current system while i am not able to, that is my fault... not learning enough... and i have invested quite a big on current setup...