The D7000 is aroiund 3 stops better the the D50 in high-ISO performance. If you're happy with the D50 at 800, you'd likely be OK at 6400 with a D7000
BrianWelsh NikonianCheck out the Nikonians Team pages
Copyright © Nikonians 2000, 2013
All Rights Reserved
Nikonians®, NikoScope® and NikoniansAcademy™ are trademarks owned by Nikonians.org.
Nikon®, Nikonos® and Nikkor® are registered trademarks of Nikon Corporation.