Hi, I'm looking to purchase a lens and due to locations cannot hold it until I've bought. I've noticed some discolouration on the focus ring and wondered if anyone else has seen this before and could offer an explantion as to what has caused it and more importantly is it likely to affect the images or is it just cosmetiic. The seller says it's been in its case for a couple of years and not been used and he has no idea what has caused it. Images taken with it look clean and there are no marks showing on them.
Thanks for any suggestions.
Thanks for any suggestions.