I currently have the Oly 9mm BCL, and while it's cheap, fun, sharp enough till the outer edges, small..no, make that tiny, it's a little clunky on the focusing mechanism. The Rokinon uses a helicoid arrangement. Both are fixed aperture..I can deal with that part. Price is a little higher, but not much. So I'm curious to see if it's IQ is as good or better. Nice to have something in the just-short-of-fisheye category. I love what you can do with the BCL, with it's 140 degree AOV. With regular focusing mechanism, I'm pretty sure the Rokinon would be a natural choice..especially if they've worked magic with it like their other wideangles.