There have been various threads asking about the advisability of using IS on a tripod, but I don't recall seeing any about using it on a monopod. Logic tells me that IS should be used on a monopod. One of the arguments against using it on a tripod is that the IS is trying to detect movement that isn't there (an over-simplification, I know), but on a monopod, there is probably a small amount of movement. Therefore, IS should be advantageous.
Any thoughts?
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hence, mode 2.
