After a few disapointing attempts to take some Panorramic series, I found things in one frame that were not in the previous. The internet provided the technical explanation, and a many firms make rigs to fix the problem, like KINGPano. I built this one out of 1/4" lexan and some knobs from the local ACE hardware. The picture should be enought to get you started or I can email you a few more. The bottom plate is slotted to adjust for the focal length of the lens and the bracket is slotted to adjust the lens to the center of the pivot point. The rig can be used in landscape or portrait.