That is the work-around. It would just be so much easier to accomplish this with one push of the shutter button instead of firing one series, making an adjustment, then firing the second series. Especially with handheld shots. The AA filter bracketing feature that was added via firmware got me thinking about this. That's also a feature that might seem unnecessary since one could achieve the same result by taking a shot with AA filter and then switching the filter off to take the second shot. So much nicer with the AA bracketing though.