Is a good idea to uprade your camera for hi res panos, the FC-E6 can be atatched to a DSLR. You can see it here: Agnos Ring Adapter.
The adapter to be suitable for connect a
AF Nikkor 24mm f/2.8
AF/S Nikkor 18-55 f/3.5-5.6G ED
to the additional converter Fisheye FC-E9 scheduled by Nikon for the Coolpix 5400-5700-8700-8400-8800.
It so possible perform circulars resumptions of 180 directly in digital. In kit with the Mrotator are performed so take back for spherical pannings to more tall resolution.
Compatible with the digital cameras:
If you going to upgrade, the best to do is to buy a DSLR fisheye (8mm F4 EX DG Circular Fisheye and shot 4 pictures) or the Nikon 10.5mm fish eye to shoot 6 + U + D.