Summary: This lens gets great reviews on Amazon. I'm going to rain on that parade. I just don't get it. I love primes and that's why I bought this one but I'm not wowed at all. The big advantage is size, this is the smallest lens for the CX system. That said, this lens is still pretty big when compared to the similar focal length and faster Panasonic 14mm F2.5 for M4/3. Perhaps I could rave about this lens if the "kit" 10-30 wasn't sharp.
Summary: i purchased this lens to shoot candid people shots. the nikon v2 is a great little camera. it's "not in your face", and no shutter clunk as there is no mirror. back to the 10mm f2.8. save your money and shoot with the "bundle" 10-30mm lens. i was not impressed with the image quality, center as well as edges. the 10-30 @ 10mm is slower but sharper.
Summary: Went to Best Buy looking to buy a wide angle lens for my Nikon D90. The sales associate recommended this lens that had to be ordered. Received the lens very quickly, but upon trying to put on the camera soon discovered that it would not work. Had to bring back to store which they were very gracious in accepting back.
Summary: This lens is proof that fixed optics are usually sharper than their zoom counterparts, until you get to the really big dollar glass. I have a Nikon J1 and have used this lens along with the 10-30 and 30-110 zoom lenses common for this camera. What's great about the 10mm is how compact it is and how sharp it is. Both things make it great for handheld "candid" photos, which come out quite well with the J1 being such a quick, compact camera.
Summary: I wanted the smallest walkabout lens for my V1 and didn't think that this lens would be so good but it is. I've compared it to the 28mm f2.8 AFD on my D800, and found that when the D800 files are downsized to 10MP the V1 and 10mm is as sharp, if not slightly sharper at f2.8. (ISO 100 to about 400) Sure, it doesn't quite have the extra "snap" of the mighty 24-70mm f2.8 or 16-35mm f4, but that not why I bought the lens.
Summary: I have had this lens for 6 months...and somehow it seems to find its way onto the V1 more times than any of my other lenses. Yesterday I went to watch a marathon and for the 1 V1 I took the 10mm 2.8 and the 30-110...well I started with the zoom on the camera...but when I got to the race I changed to the shorter lens...being able to get almost right up to the runners the 10mm was a great choice...shooting wide open my images are fairly sharp throughout .