i have this camera and im very happy with it. the colors are fuckin amazing for a 1 chip camera and you can screw any standard 37mm lens onto it. i have a kenko .43 fisheye for mine and it looks great. its focal length is rather long though so you surpass all the vig from a fisheye. the stock battery sucks though but you can get 6 hour batteries for real cheap on ebay. i payed 7 dollars for each of mine. also it has a built in digital camera that theres a switch for on top to change to card mode.
the only downfall it has is that it fuckin sucks shooting in low light conditions. theres alot of noise on the picture (by noise i mean like speckaly) and the autofocus jumps alot. the autofocus jumps with a fisheye in general so its good to manual focus (the ring makes it very easy)
all in all its a solid camera and definately one of the best out htere for its price.