The Nikon Nikkor T ED 600mm f/9 is a long telephoto-design large format lens with a 310mm image circle, covering 8x10in with minimal movements. With a 95mm filter thread, the telephoto construction is essential at this extreme focal length. The ED glass provides excellent chromatic correction. At 600mm, it enables distant subject isolation on large format that is impossible with shorter lenses, serving both 4x5in and 8x10in photographers.