... I think this information is pretty inaccurate:


"In principal the Canon EOS 450D provides everything needed for portrait
photography. In combination with one of the excellent fixed focal
length lenses and flash units it is suitable for high-quality
portraits. However, as an APS-C DSLR is "looses" about one stop in
terms of depth-of-field so e.g. a 85mm f/1.8 degenerates to a "136mm
f/2.4" which is less than ideal in this specific context."


I found it while reading a review of the Canon XSi (which I own) in Photozone (http://www.photozone.de/dslr_reviews/395_canon_eos_450d?start=3).