07-10-2016, 07:53 AM
Looks like a broken/loose screw inside the lens had a similar problem, the lens was easily repaired, the lens could have been good when manufactured, such things can happen during shipping/use
As you can see in the picture below depending on the loose/broken screw you can have any kind of image deterioration.
As you can see in the picture below depending on the loose/broken screw you can have any kind of image deterioration.