this is something new to me, and it is so nice to know this tips, I will check this out tonight.
thanks for the help.
Gene51 wrote:
Put your camera on a really solid tripod. Focus the way you normally focus - then do the same, but this time focus using LiveView. If there is a difference, then the lens and camera are not optimized, and you might want to consider fine tuning the lens to the camera if your camera can do this. If the LiveView focus is soft, then there is a problem with the lens - and sending it to Sigma will be your next step.