What is HD?

[Kwaad]

sieanr said: http://picasaweb.google.com/lh/viewPhoto?uname=kwaad2&aid=5037957467315206209&iid=5037961994210736226 Was that Mardi Gras? lol I know several people who have Sigma glass, and their relatively happy with it, although reading up on this lens people seem to prefer the Sigma 50-500mm. Granted, it's more expensive and I don't shoot much in the way of sports or nature so this isn't my forte. I find flickr to be good enough, and I really don't feel like paying for an image hoster like smug mug. BTW, I had no clue that google offered image hosting.

The 170-500 has a much larger lens. I think it's something like 70mm. The 50-500 is more like a 55mm. That makes a HUGE difference for clarity. (I like the 170-500 better than the 50-500 for images)