All he needs to do is crank up the ISO and shutter speed to eliminate vibration as a suspect. Shoot at say 1/1000, and maybe mirror lockup with remote or the self-tmer.
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.