I don't get your guys when your taking about build quality.1. Build quality of Nikon lens are excellent.2. If the build quality of the lens wasn't good then IMHO, the lens wouldn't be very good altogether.3. Even though there is a lot of plastic, doesn't mean build quality is crap, plastic is good to make a lens light weight.4. Sure plastic is always the ideal material for every lens, but it's a cost saving measure, it's lighter, but shouldn't be construed as been worse quality then other lens.5. IMHO, the only advantage with metal and other material other than plastic is that they are more sturdy.For example, the D90 is made of plastic, a lot of people buy it because it's a really good camera, it's not crappy build quality either.