topic im using a new 1DX with a 28-300mm, it can't AF when a change the focal length in EOS DSLR & Mirrorless Cameras https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/im-using-a-new-1DX-with-a-28-300mm-it-can-t-AF-when-a-change-the/m-p/137604#M18077 <P>im using a new 1DX with a 28-300mm, &nbsp;it can't AF when a change the focal length, i already update the firmware to 2.0.7, the message on the monitor says there is a communication error between the lens and the body, err 01, I cleaned the contacts as well, any ideas?</P> Sun, 05 Apr 2015 21:33:01 GMT davidgs 2015-04-05T21:33:01Z im using a new 1DX with a 28-300mm, it can't AF when a change the focal length https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/im-using-a-new-1DX-with-a-28-300mm-it-can-t-AF-when-a-change-the/m-p/137604#M18077 <P>im using a new 1DX with a 28-300mm, &nbsp;it can't AF when a change the focal length, i already update the firmware to 2.0.7, the message on the monitor says there is a communication error between the lens and the body, err 01, I cleaned the contacts as well, any ideas?</P> Sun, 05 Apr 2015 21:33:01 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/im-using-a-new-1DX-with-a-28-300mm-it-can-t-AF-when-a-change-the/m-p/137604#M18077 davidgs 2015-04-05T21:33:01Z