Sure there are several items that you will find almost indispensable as you gain more and more experience, but in reality it is the camera that is the TRULY indispensable item.
Then there is the other extreme: the photographer that needs countless brackets, supports, adapters, leveling bases, tripod heads etc, all at the same time, to shoot a pano.
I came across this picture in panomundo.com.
This is the equipment the photographer uses to shoot 360 degree interactive panoramic images. Even still he doesn't use it in this configuration most of time ( to save weight ), this setup allows the photographer to capture anything under any circumstance.
