I haven't seen a discussion on this topic, so I thought it might be useful... I have the Panny 20mm and it's my 'go to' lens for low light street and casual use (among other things!). A great lens. I have found that I often want something wider. The situations where I want something wider often are also low light, so the kit zoom just doesn't cut it (nor does it go to 12mm) Finally, I want a lens that is worth developing an 'eye/world view' with. This has been the case with the 20mm. Here's my dilemma: the new 12mm Oly seems to be a perfect combination of speed, manual focus feel (mechanical connection), and 'old world' style (Ok, I'm a romantic - I love my Pen F 38mm more than any lens I've got...). But at 24mm equiv. is it too wide for street/people/candids, etc? At this price, it's gotta be a 'no compromise' lens for me. The Panny is half the price, though not as fast. Size isn't that important in this case. (I have the 12mm on pre-order: the final test has to be with lens in hand...) Anyone else facing this issue?