To be used on the E-p2: I have several adapted lenses for special use, but want to buy an auto focus lens, for every day carry. To be used for family, church events as well as some outdoor work. 20mm 45mm Pana 14-45mm So? Here are my thoughts. I have had the 14-45, and it is a good lens, but a bit slow for low light, without flash. I also don't prefer zoom lenses, although I have not written it off. I am leaning toward the 20mm although, if I could, I'd have it and 45mm. I am only going to buy one at this time. And yes, size does matter. So, your collective thoughts please?