That looks like the ticket! Nice work.
Also to mention cause I didn't notice it above: turn off VR or Image Stabilization.
pigpen wrote:
Do not set focus to infinity. Nothing focuses @ infinity. Try it: put the camera on a tripod, turn to infinty, then back off a little bit. That should be in focus.
This was taken last night with the 400mm "L" lens, on a tripod.
Autofocus
F/8
1/250
400mm
ISO 100
Raw
slight crop