Rather than jump in with the Canon or Sigma Fisheyes, I'm wondering if you good folk have opinions on lower cost models such as the Zenitar 16mm or the Peleng 8mm. Bear in mind I'm on the crop range of EOS (30D, 400D) and know not to expect full Fisheye views from these cameras.
I've searched about and opinions vary quite a lot. I'm only looking for this as an effect look and want to decide how useful it is, before making the jump to a more expensive version.