Robin Good: If you are looing for the best and most interesting appcessories for your creating viddeo with your iPhone (or iPad), here is an excellent guide by Diana Faustmann, covering some of the best tools available out there.
The focus of this set of mini-reviews is on:
-> 360° panoramic photo and video imaging
-> Robotic panning and framing of subjects, and
-> Remote trigger control of an SLR/DSLR cameras.
Included are also links to helpful technical and user reviews, where available.