I dont get what your asking. I have seen .3 century on an Fx1 and it looks good, some vignetting though. But Century makes the best fisheyes from consumer to proffesional grade cameras. The ultra fisheye 160 degree angle lense isnt out yet I dont think, all I have seen is a thumbnail image
Buy only after testing. To compare, use a large aperture and look for softness on the edges. I bought the 0.65x 58mm converter 'MK II" which allows zoom in, to use it with my JY-HD10U and I was disappointed. It was way softer in the edges and I never used it for second time. Note that it was recommended as compatible from the manufacturer. And I tested it on the shop but it was my first wide-angle and I didn't noticed it there. I was looking to find out if it was... wide enough!