Hi all - new to this forum and have the following query for the experts: I've just recently got myself a copy of an Olympus 85mm f2 silvernose in what looks to be excellent condition. On doing some simple test shots it seems the image is slightly out of focus on the right side - decentered?. Is there anyone way to correct this oneself ? I am including a link to a RAW file showing the issue taken at f5.6 on a Sony A7 - be warned its a 24mb file. https://googledrive.com/host/0B-UmcyDZF0cRSkFwT0hZdmJ0YVU/_DSC3449.ARW I'll be the first to admit that it's not the worst example I've ever seen and I'm probably pixel peeping but seeing how good the lens is overall I would love to have that same quality across the frame. Image does improve a bit by f16, the max, but then so does diffraction.