I've just found an opportunity of getting an AF Nikkor 24mm 1:2.8 (a lens that I've been considering to add to my gear for a while) for a bargain price (something around 30-40 euro). The catch is that the coating in the rear element is damaged. See the picture: My question is, to what extent would this affect the image? Sorry it may be a stupid question, but it does seem to be only the coating; on the other hand, I can't really see the point of coating the rear element (excuse my ignorance here). I am considering going for the bargain, but as you see I still can't see whether it really is a bargain or just a way of throwing money away, since as it is the lens would perform badly. Thanks for your comments! By the way, I would appreciate a quick response here: this is an ebay listing that I've just seen a few hours before it ends!