Ultra Wide-angle Lens Review

For those interior photographers either have or are considering purchasing a Digital SLR such as the Canon 20D, 30D, 350D or Nikon D50 or D70 a ultra wide angle lens is an essential piece of gear because of the magnification factor of these bodies. Ken Rockwell over at kenrockwell.com has a wonderfully in depth review of the ultra wide angle lens alternatives for these bodies. That is, the lenses that come with these DSLR bodies are not appropriate for interior shooting. For interior shooting you need a ultra wide angle lens in the 10mm to 20mm range because of the 1.5 & 1.6 magnification factor of these bodies. Ken compares all the alternative ultra wide angle lenses.