Because Sigma doesnt buy license and do only reverse-engineer other's stuff. Maybe Tamron/Tokina do buy a license ?
2006/8/4, Carlos Royo <[EMAIL PROTECTED]>: > Jaume Lahuerta wrote: > > Sorry if this has been already mentioned. > > > > Concerning Sigma EF-500 DG Super and EF-500 DG ST > > > > It says that Sigma offers a free upgrade on the > > flashes. > > > > That's the main reason I shy away from Sigma products. I have seen their > compatibility problems before, and not only with Pentax. On the other > hand, I've had Tokina and Tamron AF lenses and haven't experienced any > problems. > > Carlos > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- ---------------------- Thibault Massart aka Thibouille ---------------------- *ist-D,Z1,SFXn,SuperA,KX,MX, P30t and KR-10x ;) ... -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
