Geofw wrote:
I have the Canon 7D mark ii, when I use the Sigma 100-400 I frequently get "Error 01 lost communication with lens".
Sometimes all I have to do is turn the camera off & back on, other times I need to remove the lens and reattach it.
I don't have a problem with other lenses, or with the same lens on my old camera.
Any help & advice would be appreciated.
Clean the contacts on the lens and see if that corrects the problem.