You are in the superfisheye level there from 16x9. They have one. I personally own the scneider/century fisheye. it's a .55
The lens on this is so wide already that a .55 is considered a fish and .45 is a superfish. I love the century lens... so clean with no vignetting and just money with the bayonette mount. LOVE IT
I'll post some footage when I get the time off. Busy working a lot this summer