im wondering if anyone has used a fish eye attachment and has some pics? i searched and found some in old threads but no one really said what they were shooting with (what the attachment was on) ive got a canon 20d with a sigma 24-70 f2.8; i would love a fisheye lense but the cash flow is a problem, plus its nothing more then an effect lense, though i seem to be intrigued by this and would like to play around with one. i shoot mostly dirtbikes, motocross. i shot with a sigma 10-22 last weekend and got just a small amount of distortion. back to my original questions, id like to see some pics with info regarding what it was shot with..and if anyone has suggestions on which 'cheap' attachments are better then others. thanks.