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.
![[Image: lens%20barrel%2017-85%20loose%20clips.jpg]](http://www.uploadarchief.net/files/download/lens%20barrel%2017-85%20loose%20clips.jpg)
As you can see in the picture below depending on the loose/broken screw you can have any kind of image deterioration.