I'm thinking about getting two versatile lenses covering the range between 28-80 mm and 70-300 mm.  As I now have a Nikon N70, a salesman told me to consider the Sigma's 28-80 f3.5-5.6 asph macro + Sigma's 70-300 f4.0-5.6 APO Macro, rather than Nikon's 28-80mm and 70-300 mm line of lenses.  He is charging $50 more for Sigma's pair of lenses, arguing that Sigma uses _meta_l and glass instead of Nikon's polycarbonate, plastic materials, and says that Sigma's lenses are faster, quieter, and have macro, unlike Nikon's counterpart lenses. I'm wondering if anyone has had any experiences with Nikon or Sigma's 28-80 or 70-300 mm lenses and if you could comment what made you decide which brand name to go with. Thanks, eugene This e-mail address is being protected from spam bots, you need JavaScript enabled to view it