Excerpt: The color rendition is super, rich, vivid and fascinating in all the shot that I took with it. I am not going to talk about bokeh because as being a wide angle lens I believe we cannot everything.
Excerpt: I use this lens far more often than I ever thought I would use a 15mm. Images are beautifully rendered even wide open. Great for portraits in tight spaces if you are careful -- the distortion control is very, very good. I find the size to be just perfect on a DSLR. It handles amazingly well.
Excerpt: I have had this lens for almost 2 years and is a companion to the 40 and 70 for walk around. It performs best at F8 and is a joy to use. It is a quality piece and the pictures it produces are stunning. I use this a lot for waterfalls and landscapes. It got a lot of use a couple weeks ago in the Mayan Riviera. The ruins were detailed and the colors are typical Pentax.
Excerpt: Most important: this lens is great fun to use and the pictures look great. It's huge fun for dramatic and distorted perspectives. Can be great for street photography, and for architecture too. (It guess it might do good landscapes too but personally I prefer longer lenses for that.
Pros: Low aberrations and distortion, superb in backlit conditions!, good sharpness, compact, fun to use, pictures look great!
Cons: Wobbly built in hood, sharpness at longer distances?, a bit pricey
Excerpt: First, this lens is in the "just buy it" category. I waffled for several years, even trying out a Tokina 12-24 F4 in Nikon mount as a half-price proxy, mainly because I was unsure about whether I would actually use of the ultra-wide focal length.