I just got a 50mm 1.8 OSS lens the other day and am already in love with it! It's gone to the top of my list as favourite lens on the 5n, and I can back up everything that has been said here, great bokeh and OSS is fantastic for both photos and video, and very crisp / bright images can be made. I only have 1 issue that i'm not sure about. The lens was purchased off ebay and it is quite loud when finding focus, especially the smaller the aperture set. I have looked into the lens and see that it opens up wide and then closes down to the correct aperture when focussing, this makes a grinding kind of sound.. is this normal?