Picked up this beauty off eBay for $214. The seller had the Best Offer option so I said why the hell not. I offered $200 and much to my surprise, they accepted! When the lens arrived, sure enough the rear lens cap was tough to open. I just used my undershirt and gave it a twist. Came right off. The glass is perfect with no scratches, aperture blades are clean and focusing is smooth. So far I'm loving it. The lens feels sturdy and of high quality, way better than any other 50mm I've owned (50 1.8D, 50 1.4D and 50 1.8G). Does anybody have any experience with this lens? I'm trying to master the narrow DOF at 1.2 with this monster. Using it on a D750 currently. Just wanted to start convo on this cool lens.