That is NOT a problem that is correct. Your images should be shot in portrait mode making the sides of the image cropped. You then stitch the image with Panoweaver 4.0 or 5.0 Beta in "Drum" mode.
You can only get a full circle with a Sigma 8mm on a "FULL FRAME" sensor camera like the Canon 5D or Canon 1Ds professional DSLR.
All lesser DSLR cameras have a smaller sensor than a Film SLR Canon by 1.6x and Nikon 1.5x
Quote: Originally posted by xavier on January-16-2008
I'm going to buy a used CANON EOS 1D MKII 2 to use with the Sigma 8 mm. Can I get a full circle with this camera?
No you will not get a full circle with this camera using Sigma 8mm. You need a Canon 5D or Canon 1Ds MKI, MKII or MKIII or Nikon D3 full frame sensor camera.
You now can buy Sigma 4.5mm Fisheye for smaller APS-C sensor cameras that WILL also give full circle images.