[Peted]

I also have a 18-50mm Sigma which gives reasonable results. I like playing around with the nature shots, live sort of in the middle of a large National Park, birds and the like. My 55-200mm Sigma gives me variable results, I have had some excellent shots but would like just a bit more range. A friend has a 170-500mm Sigma and that seems to be very good but it is pretty expensive, I love my photography but cannot spend that sort of money, if I try really hard I think I can stretch to the 28-300mm (the 100-300mm's are cheap but not optimised for digital like the DC's or Di's so are likely to give average results).