Hi Jhon, apologies for the slow response to this. I myself use an ancient Nikon Coolpix 4500 and attach a Nikon Fisheye FC-E8 converter lens on it, so I'm afraid I'm unfamiliar with the EOS 60D. However, I know that you normally have to go into settings and change the lens type to 'fisheye' - normally there are 2 fisheye settings, one is 'full frame' and the other is 'standard' - it sounds to me like you may have it on the 'full frame' setting, which would cut off the corners as you describe. Try changing the lens type settings, if indeed the 60D has these features - sorry i can't be of any more help - I'm sure someone within the network uses a 60D thought...I'll have a think. Good luck!