I do wish somebody besides Sigma made a 20/2.0 (Olympus did, back in the OM era).
Perhaps the fact that only Sigma does suggests that the manufacturers don't feel they can make such a lens up to their standards at a reasonable
size and price (not that those factors ever seem to deter Canon...)
I've tested extremely unscientifically Sigma 24/2.8 against my K 24/2.8. Sigma is tad sharper but loses contrast to flare.
MHO would be that in case of wide angle the Pentax lenses could be preferrable for their coatings...
Just MHO and no more.
BOris
