Originally posted by ajuett 1 stop can make all the difference and it's better than bumping up ISO. That's just my personal opinion. Saying that, I used the DA14 at f/9 for the majority of the time, mainly for landscape shots in good weather.
Well, yeah, and you're not alone in that. That's kind of the point - for "most" people in "most" situations, a 14mm or 15mm lens just isn't likely to be used at f/2.8 very often. Not that you couldn't come up with creative uses for large apertures, but if you're going out of your way to use a wide angle lens to get a lot of "stuff" into the scene, most of the time, you'd want as much as that stuff to be in focus as possible - and handholdability is seldom a big concern at those focal lengths either, even in fairly dim light.
FWIW, I keep going back and forth on whether my next major lens purchase with be the DA15 or DA21. I'm leaning back toward 21 now. Not because I'm not sufficiently impressed by what I've seen of the 15 or the reviews it has received, but just because I am pretty sure I'd find 21mm a more useful FOV more often. The only thing that makes me a little sad about that thought is the idea that it would probably replace my M28/2.8 in my bag; with the 15mm, I'd have more incentive to carry both. What I'd really want is a "pancake" 17mm or 18mm, though.