as you can probably tell i don't know alot about cameras, but would like to...

anyway i was just wondering if you need a different lens to get a fish eye effect or if it is done whilst editing.
The only problem i can see is where the lens clips onto the camera. if someone could point me in the direction of some fish eye effects it would be greatly appreciated !

soo do you reckon something like this would be ok ?

http://www.amazon.co.uk/Sony-VCL-HA07A-0-7x-Conversion-Handycam/dp/B000NWMZ0S/ref=pd_cp_ce_2?pf_rd_p=136153791&pf_rd_s=center-41&pf_rd_t=201&pf_rd_i=B0002XOY84&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_r=05QQX7FAX0RV0AJN68K4