07-10-2013 08:03 AM
07-10-2013 11:26 AM
If you plan to use it for HDR. Or when you're in a situation that changing too fast and you don't want to stumble around with the setting at the critical moment. In some situation, where the contrast is too great for single capture, you may want to turn it on.
07-10-2013 12:13 PM
Like others have said, HDR is an obvious use. For HDR you might bracket +/- 1 1/2 or 2 EV.
Also where time is of the essence, like a sunset for instance, it can facilitate getting various exposures without having to adjust. Here you might only bracket +/- 1 EV.
If you have a body that can bracket more than 3 images, you can set it at +/-1, bracket 5, and have everything you would need for either normal or HDR processing.
07-10-2013 10:31 PM
You need to use the AEB feature because the RAW format can provide true EV range of only +- 0.5 EV.
If that's the range you need, then no need to bracket the shots.
But if you need a +-2 EV or something like that, using RAW file would cause loss of data and details. That's why it is best to use EV bracketing.