Or simply because Sigma is more famous than Pentax.
Regards, Alan Chan http://www.pbase.com/wlachan
Because there is a higher profit margin on Sigma lenses?
_________________________________________________________________
Add photos to your e-mail with MSN Premium. Get 2 months FREE* http://join.msn.com/?pgmarket=en-ca&page=byoa/prem&xAPID=1994&DI=1034&SU=http://hotmail.com/enca&HL=Market_MSNIS_Taglines