Really Wide Angles?
Really wide angle compositions are as easily accomplished as they are with full-frame SLR camera. Most dSLRs today have a sensor that is smaller than the 35mm film cameras.
This means that lenses that provided very wide angle views will not provide the same view on a digital SLR. Why?
Because of the crop factor that is introduced when moving to a sensor that is less than the 35mm format.
Unless you have a full-frame digital SLR like a Nikon D3, D700 or Canon EOS 5D or EOS 1Ds Mark III, this will be a concern for you.
Return from Really Wide Angles? to Disadvantages of dSLR Cameras