definitely! especially after using an adapter by opteka. it was cheap and fun for a while, but just didn't cut it. the rokinon is also fairly cheap compared to some fisheyes out there and is clear as a bell. it just takes a little time getting used to the manual aspect of it. if you're not doing closeup stuff very often though, you don't need to worry about it.
Yea, I had one of those adapters and it didn't work - I guess because I have a cropped sensor. What camera do you use?
I did the research and that fisheye has been reviewed well. It's only around $200. I think I will get it after I get my zoom - Tamron 28 - 75. All I have right now is the nifty fifty and a 100 - 300. Pretty limiting.
i've got the 50mm too, the 8mm, a sigma 70-300 telephoto and the kit lens that came with my canon xti - a 17-35 that's pretty shitty. prime lenses are soo much clearer. and the adapter should have worked. for mine, i just attached it to the 17-35 and it just made the wide end wider.