follow up
I recently toured a home (for purchase) and took the camera with me. While my wife and the realtor talked... I walked through the house snapping pictures. Some were blurry and I noticed that if there were nearby objects just off from the focal point, the image was blurry.
Example.. I shot a bedroom but stood in the bathroom to do it, which meant the door frame was just on the very edge of the image, but on both attempts, it was blurry.
Maybe that helps? Maybe not?
Shawn