There are quite a few posts comparing the 7-14 and 9-18mm. In general, the consensus seems to be that the 7-14 may have slightly better optical quality, while the 9-18 is a great value and size. However, what it boils down to is what it's used for. All the threads seem to focus on which has better image quality versus the trade-offs (size and price); however, as a hiker/backpacker I am willing to sacrifice image quality for something that lets me get the shots I need while out in the mountains. As they say, the picture you take is (often) better than the one you don't. After getting tired of lugging my Sigma 15-30mm, 70-200mm and 10D all over the place, I have bought into the u4/3 system. I'm trying to decide whether the 7-14 or 9-18mm will be more appropriate for hiking. If you're a hiker or backpacker, do you have either and what has your experience been? If you have the 9-18mm, do you ever wish you had that extra 2mm for a landscape shot? If you have the 7-14mm, do you ever wish it was a little more compact?