I got a Sigma 8mm fisheye for a few days, I was doing a photography job which included a panorama and everybody knows a fisheye is the best option you have when doing something like that. I just had to play with it a little more than i was supposed too though lol I was short on time so I used my blazer and didnt strobe it, I know….I suck.
The lens is neat, its different, and it gets old fast. I mean if I had a D3 and every big baller lens I ever wanted then yeah Im sure I would buy a fisheye. The thing is, while its a cool little lens, the effect and the distortion got old to me quickly. With a price tag of around $850 I could thing of alot of gear I would much rather have. Thats my personal opinion though, if you do alot of pano’s, landscape or real estate photography then you gotta have a fisheye. In the end, while its not something I would buy for my camera bag, it was fun playing with it for a couple days.