Exp and ISO bracketing
I put in a post about a week ago regarding exposure bracketing on the X-T1 and a possible alternative to it. Not getting any real response to my post, I’ve now experimented a bit and discovered something of interest, at least to me.
The normal exposure bracketing takes three individual frames during about one second, varying exposure and aperture as necessary, and makes an unpleasant rasping sound while doing so. Moving objects will clearly have changed position slightly during that period (much slower than with, say, a 7D, which shoots at 8 fps).
ISO bracketing takes one frame, which is then duplicated with varying ISO values, producing three frames with different densities but identical exposure and aperture values. This takes no longer than a single shot.
It would appear to me that using ISO bracketing instead of exposure bracketing has several advantages.