Given our weather the last couple of weeks, it is either High-ISO or nothing. Here is a shot which was taken handheld with my D200, Sigma 500mm f4.5 and the on-board flash. This is an ISO 1600 image from my backyard, about 30-40% of the total image. The first image has Noise Ninja applied, the second is with no additional NR other than what the camera applied. One of the main things I was looking for was ISO-1600 performance, so far I am not unhappy. Noise Ninja: No added NR: A few more High-ISO shots can be found in the Bird gallery.