Summary: There are so many thoughtful, detailed reviews of this lens that I really have very little to add by way of information. But I can say that I have been a keen photographer for more than fifty years, having owned an unbroken line of Pentaxes since the 1960s.
Superb build and image quality make this a pleasure to use
9 December 2012
Summary: All the Pentax DA "Limited" lenses are a real pleasure to use especially for manual focus. The full metal construction and silky smooth focus action really set these apart from most modern auto focus lenses.
Summary: I purchased this lens for my new K5 and it performs admirably! The MTF resolution is stunning and the focus on the k5 is quiet, accurate and fast On a slight downside; the screw on lens hood is a bit of a hassle to add or remove but the lens is so short that it can be left on the lens.Also the lens...
Summary: I just love the Pentax Limited lenses. Compared to Canikon, you get more for your money. Granted, Pentax is not as popular here in the US, but their lenses are really good. The build of this lens just exudes quality. And the Images - fantastic.
Summary: I've gone sort of nuts buying Pentax lenses for my k5 and kx. I have the 10-17 Fisheye, 15mm Limited, 21mm Limited, 35 mm Macro Limited, 40 mm Limited, 70 mm Limited, 200mm DA*, 50mm Takumar m42 and just bought the 50mm f1.2 SMCA. I take a lot of events/street, flowers and nature shots.
Summary: I am always impressed by the clarity of this lens and how nicely solid the build is. If you love to shoot a prime and long for a seriously solid metal and glass lens, the pancake series is for you! I plan on also getting the 40mm for a daily lens.