Not much interest shown here so far for cost-effective solutions.. Hmmmm
As a proof that I am not talking nonsense here among Canon club members (btw, I also belong here as I own Canon 400D)... .. have a look at this website below, and search for "russentonne" or "MTO" or "Spiegeltele" (those lenses are very popular in Europe, and referred to as Russentonne - just try to google a bit and you will see what I mean..)
http://www.mhm-ka.de/CANON.html
There are some amazing images taken with those low-cost lenses.. for 1/10th of Canon price. And they are not THAT much worse, aren't they? :-)