I've got some big jobs coming up and am in need of a wide angle in the 10mm area, or wider. My 24mm is nowhere close to the angle I need. The first thing I will use it for is a very large full church interior (with all the members in the church). The pastor wants the shot from the back of the church and he wants to see as much of the church as possible. The second thing would be wedding usage. The only two lenses that are coming to mind are the Nikon 10.5 or the Sigma 10-20. I would love to see some interior shots from both of these lenses if you have some. It would be awesome to see side by side of the lenses in the same location. Are there any other lenses out there that may fit the bill? I had thought of the 12-24, but I really believe I need wider. Then there is the decision of fisheye or rectilinear???? Oh, I've got a few months to decide, but thought I'd better start looking now.