Nothing. The D7000 has a built in flash that can act as a Commander/Master for for Remote SB-700/600/800/900/910 in wireless TTL or Manual Remote. The SB-700/800/900/910 all have a built-in SU-4 control port.
GeorgeMy Nikonian Galleries
Copyright © Nikonians 2000, 2014
All Rights Reserved
Nikonians®, NikoScope® and NikoniansAcademy™ are trademarks owned by Nikonians.org.
Nikon®, Nikonos® and Nikkor® are registered trademarks of Nikon Corporation.