Hi Shel, I own the 2.8/16mm Fisheye(do you mean this one?). I am quite pleased by the good results (regarding the price of the lens). I used it on my *ist D and the resolution is good enough. I saw no obvious chromatic aberration. Only when pointing towards the sun there was some reflexes visible but not too bad for such a wide lens (one cannot use a lens hood).
Best regards, Hans. _____________________________________________________________ 23a mail