> With so many wonderful Pentax lenses to choose from, why would anyone > buy third-party?
Sometimes Pentax doesn't do the lens I want (Sigma 17-35 vs FA 20-35/Sigma 100-300 F4) Sometimes Pentax is too expensive (Sigma 28-70 F2.8 vs FA 28-70 F2.8 Powerzoom) Sometimes Pentax is too bulky (Sigma 105 F2.8 Macro vs FA 100 F2.8 Macro/Sigma 70-200 F2.8 vs FA 80-200 F2.8) Sometimes Pentax is NOT the best (Sigma 70-300APO vs FA 80-320) Granted I would prefer all of these with Pentax glass, but it just aint possible/sensible.
