I own a K7, and the DA 21 mm / 3,2 AL Limited and DA* 16-50 mm / 2,8 ED AL lenses.
The zoom is quite big and bulky, but I appreciate the fact that it is weather-resistant, much like the K7 body. This makes for a great outdoor camera because on hikes you don't have to worry about your equipment surviving heavy rain etc - on hikes I was more than once happy that that was the case.
I know that the kit lens is also weather-resistant, but it doesn't have the 2.8 aperture of the DA* 16-50 mm. In retrospect however, I sometimes wonder if I would buy the DA* 16-50 mm again in a similar situation, I think the kit lens would probably be sufficient for me.
This brings me to the DA 21 mm, which I appreciate for being very small, thus making the whole camera relatively portable and inconspicuous (for a DSLR); and as some here on this thread, I also prefer shooting with prime lenses - before owning the Pentax, I used to shoot with a Ricoh GR Digital (28 mm equiv.), and before that, with a Nikon FM2 with a 35 mm lens. As you know, the DA 21 mm corresponds roughly to a 35 mm in full frame, which is my favourite focal length.
I am currently spending a few weeks in London and I have brought the K7 with the DA 21 mm with me (and left the zoom at home), and even though I have not used the camera for quite some time, I am rediscovering it again and enjoying it a lot - I do not miss the zoom at all.
Samuel.
