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I used to have a lot of juddering when panning with my camcorder and I suspectIi would get the same using any other camera.
So by trial and error I found out how to overcome it.
Ii can only say what I discovered with my camcorder which shoots at 50 frames a second. if i videoed at a shutter speed at the same rate, disaster every time. So to get over this i now video at a shutter speed of 125 fps.
Wether this is correct or not or even anywhere near i don't know, but what i do know it works for me .
here is an example I took this evening for someone on another photographic site using my camcorder and a pistol grip to help steady
Seeing it was done quickly i don't think it came out too badly