Summary: There are plenty of other lens quality reviews. They are all correct. This(along with the other Pentax Limited lenses) is an excellent quality lens. I just wanted to share that with the B+W XS Pro UV filter, which is relatively low-profile to begin with, the factory-supplied push-on lens cap will not stay on. A old Pentax factory 49mm clip-on M-lens cap will fit.
Summary: The purchasing process was flawless as expected. Delivery was on-time. The lens has performed beyond my expectations. Now to save up for a 77 mm f/1.8 Limited. Thanks, Amazon and Pentax, for another great purchasing experience.
Summary: Very, very sharp. Used with a K5IIs ie. without the AA filter. I can't compare it to anything I have done before because it is easily superior. I have used film and digital before, but this pentax kit is the best I have used. Also bought the 15mm limited lens. Sharp Macro images completely fill my screen with stunning vibrancy - this could be a subjective preference - razor sharp vs neutral, softy-but-clear sharp, like what other camera manufacturers seem to 'tune' their...
Summary: Very nice lens for walk around snapshots and macro's. Very versatile and light weight. Excellent, all metal housing, and a nice dampening feel when focusing manually. Capable very sharp photo's/macros.
Summary: This has quickly become my favorite lens. It's great for macro and everyday shooting and tends to be the lens I leave on my camera as it is the most versatile. I also love how non-invasive the lens size is. The only down I can think of is the macro, it works amazingly but its focal length isn't great for something like an ant antenna.... If you're looking for that, go for one with a longer focal length.
Summary: well built, awesome rendering, compact enough to take anywhere, extremely sharp and amazing color. lens cap isn't the tightest though and can come off when you don't want it to... this lens is a keeper!
Summary: Remember all those great old lenses you've held or used in the past, with metal barrels and mounts, with knurled metal focusing rings and a noticeable mass in the hand? This - and the rest of Pentax's Limited line - is a return to those feelings. It's heavy and dense and beautiful in fit and finish. The built-in lens shade is a close fit - mine won't extend with a polarizer fitted - but well made and attractive.
Summary: This lens is compact, well-constructed with a handy built-in retractible lens hood, and takes beautiful photos indoors and out. Being close to a full frame "normal" lens makes it suitable for all types of shooting, from scenery to portraits, and the fact that it also does amazing macro is truly a bonus.