I have one
listed here, with many sample images from it.
It's certainly large compared to any of the DA Limited primes, but the size is a bit exaggerated.
Here it is compared to some other lenses:
Lens | Dimensions (mm) | Weight
-----------------------------------------
Pentax DA10-17 FE | Ø68 x 71.5 | 320g
Pentax DA14/2.8 | Ø83.5 x L69 | 420g
Pentax FA31/1.8 | Ø65 x L69 | 345g
Pentax DA*55/1.4 | Ø70.5 x 66 | 375g
Tamron 14/2.8 | Ø87 x L87 | 675g
Samyang 14/2.8 | Ø96 x L117 | 552g
Sigma 10-20/4-5.6 | Ø83.5 x L81 | 470g
Sigma 10-20/3.5 | Ø87.3 x 88 | 520g
And here it is side-by-side to the DA 18-55 II lens:
It does feel larger than it is. I believe this is for several reasons. First, it's very dense for it's size (metal body) and slightly nose-heavy (due to the large front-element). Second is the 77mm filter size that makes the front of the lens disproportionally large compared to it's body. Third is the hood is really big (although not heavy).
The reality is that there is nothing on the market like this lens, that is this wide, this fast and this small (see table above). There is nothing like it for Canon, Nikon or Sony. Everytime I am tempted to switch systems I start planning out a lens arsenal in them and then realize they have no decent, reasonable sized/priced wiiide APS-C primes! The only other lens that is comparable is the DA15 Ltd, ironically.
The coolest thing about the DA14 is the very short minimum focus distance (1:5, almost touching the front element) allows close-up wide-angle images that you just cannot get with any other lens (except perhaps the DA10-17 FE). Certainly none of the UWA zooms can get close and the other nice small primes have terrible minimum focussing distances (Sony E16/2.8 and Panasonic 14/2.5 are both disappointing 1:10).
The second coolest thing is the Limited like aluminum body and general solid construction.
The main thing I don't like is the very short focus throw (but the DA15 and other AF UWA zooms also suffer from this). The other thing is I wish it were sharper below f/5.6, but it does sharpen up nicely with a bit of PP'ing. It does have good contrast and colour and both ambient and flash exposures are very consistent with it.