Summary: The lens focus seems a little softer than the XF 18-55mm F2.8-4.0 Lens which is the kit lens that comes with the Fujifilm XT1. Also I was surprised by how loud the lens was when focusing. Overall disappointing.
Summary: This is my only Fuji higher-end quality lens (bought used on Ebay for $400.00) and I'm a curious why this lens design has as many optical negatives as it does for all of Fujifilm's lens manufacturing clout--together with its high price. I generally expect a good digital camera lens to really fly right when stopped down to F5.6 or F7.1, but images from the FX 18mm, while always tack sharp in the middle of an image frame, grow soft at the margins through varying degrees...
Summary: I bought this lens to use at night around town and to allow me to stuff my XE1 into my pocket. It worked okay. Not nearly as crisp as the Fuji 35mm. It was only slightly crisper than the 18-55mm kit zoom. It does allow a very tight macro focus. I sold it and will likely replace it with the 23mm.
Cheap accessories and no DOF scale on the lens body...
K. Foust "KFo", Amazon
29 May 2013
Summary: The performance and quality of this lens is good albeit with two issues that really irritate me. The first is the quality of the lens cap and the cap that comes with the lens hood. These two accessories are like "copy exact" cheap almost non-functional replicas of good quality pieces. The lens cap fits so loosely that it will assuredly fall off the first time you put it in a camera bag. The cap for the lens hood just slips on and will disappear with equal speed.
Summary: Delivers great quality and is very quick. My only gripe is that there is no focal plane window on the lens. Seeing as how I use this lens for a lot of street photography using zone focusing it makes it hard to know where I am at. Also, the focal ring is very sensitive and gets pushed off where I set it easily which only exacerbates the issue of not knowing where I am at the focal plane unless I turn on the view finder or look in the eyepiece not something I have the time...
A good lens if you can get past Fuji X system limitations
19 July 2012
Summary: The small size and light weight of this lens were what first attracted me to it. Along with the fact that it was the widest X lens available for the original X system when released. It does make a very easy to carry package even on the heavy X-Pro1 body. Focusing is a mixed bag. Auto focus depends entirely on the body. X-Pro1 auto focus is painfully slow even after their multitude of firmware updates. The X-E2 auto focuses quickly and silently with this lens.
Summary: I really wanted to like this lens, because it's small and light and has a useful angle of view. (I find the 14mm, which is a fantastic sharp wide angle lens, to be a little too wide. I wish Fuji made a 16mm prime.) However, the edge sharpness in the 18mm is pretty mediocre. The 18-55mm zoom has better edge sharpness at 18mm, and that just shouldn't be. Even stopping down to f8 or 11 doesn't help a lot.
Excellent optics, fast, but inhales dust. Lens hood is terrible.
I. Norman, Amazon
19 July 2012
Summary: The smallest fast lens for your Fuji. It's got a brilliantly fast f/2 aperture that helps it work in very low light conditions. I love that it's so small. It's basically a pancake. I have no issues with the lenses sharpness or performance at all, it's downright awesome. My biggest issue is with its sealing. The lens racks the elements back and forth during focusing and the front barrel moves in and out which causes the lens to suck in dust.
Excerpt: Fuji's intro into the interchangleable lens market hits the mark with these lense, but loses in terms of build. The lens feels flimsy and cheap. The aperature ring isn't smooth when ticking over f-stops. The good side is that filter size are common and the included lens caps and hoods are nice to have.