My Canon 24-70 f2.8MK2 has gotten a small scratch on the front element. First lens this has ever happened to. It's really just the coating not the glass, and I have never seen any effect in my images, but I suspect it adds a bit of flare in some situation. I was sending my 5DSR in for cleaning anyway so I included the lens and asked for an estimate to fix the scratch. They said the whole front lens group must be replaced at a cost of $539. I was lerry to start with as this lens is super sharp and has no issues with alignment, which could have been made worse with repair so I declined and they will ship it back. I am supplying this just for info. Anyone else ever had this experience?