I am not sure which one to get next. I can get the samyang 7.5mm cheaper than the 12mm but the fisheye effect seems like a specialty thing. I know you can defish but that just adds another step in post processing. For this reason i would prefer the 12mm because it is not a fisheye and it is faster. (nearly half the price of the O12 i might add) So i am wondering which lens is worth getting next.