« on: August 17, 2012, 01:51:36 AM »
I don´t have any problems with the AF (1D X, 1D Mark IV, 1 Ds Mark III, 1 Ds Mark II, 1 Ds, 5d Mark III and the rest) in Canon cameras. The only problem I had with th EF 50 1.4 that needs some adjustments after buying it a few years ago.
Even with the old seven point AF build in the 350D in combination with the EF 70-300 IS I shoot very fast squirrels a few weeks ago. With the 5D Mark II the 350D is my "24h in the car" camera for private use. All images are in focus and sharp. The 350D is also my camera with the most shutter releases and antediluvian my first 1 Ds Mark III and 5D Mark II together.
If you shoot with very long supertelephotos or if you shoot under bad conditions it´s advisable to focus manually.