The 30mm is an excellent lens, but you need to be aware of one or two limitations. First, if your experience with ultra wide angle lenses is on a regular format, rather than 6x17 (say), you may miss the height. The beautiful images posted on this thread don't suffer from this problem, on account of careful choice of subject matter, but sometimes I do miss the "wide angle depth" that is provided by extra height (relative to the proportions of the Xpan format). Secondly, the lens is slow, and (unlike the 45mm lens) you can't really use it effectively without the centre filter, even on print film. This means that you lose a lot of speed, and that creates limitations. For both of these reasons I find that, unlike some of the other posters above, I use the 45mm more often than the 30mm. Peter