I have discussed about exposure compensation and bracketing previously where I talked about what is an exposure compensation, when to use it and what does bracketing means? Now lets talk about Automatic Exposure Bracketing (AEB) feature and how to set controls for Nikon D90 to implement exposure bracketing.
Sometimes manually bracketing and taking multiple shots will be tedious job, that is the main reason we use Automatic Exposure Bracketing (AEB) where the camera will take three shots automatically (provided you are in continuous shooting mode or burst shooting mode) when we press shutter release button once: one at the camera measured exposure, a second at a negative exposure compensation (usually -1/3 EV, Nikon D90 allows you to specify this value), and a third at a positive exposure compensation (usually +1/3 EV).
How to set Nikon D90 for AEB?
1. Press the Menu button on the left hand of your camera.
2. Navigate to your Custom Settings Menu (Pencil icon).
3. Go to e bracketing/flash menu, option e4 is for setting up Auto Bracketing with different options.
4. Set option according to your need. Automatic Exposure (AE) is what we are discussing here.
You can also set the order of how you want your camera to take photographs whether it is correct exposure, under exposure and over exposure or under exposure, correct exposure and over exposure. For that you have to go to e6 Bracketing order menu under e bracketing/flash menu and set the order you want. This doesn’t make any difference on exposure anyway. It is just the order of files.
Now the next step is to set the exposure value and number of frames you want. Nikon D90 allows you to shoot 2 frame over exposed and one correctly exposed (+2F), 2 frame under exposed and one correctly exposed (-2F) or traditional 3F (under exposed, correctly exposed and over exposed). So the maximum number of frames is 3 for Nikon D90. To do that press the BKT button on the left side of your camera just below the flash (where D90 logo is written). When you press BKT button, you will see option to set exposure value and number of frames. Now rotate the main command dial to change the number of frames whether it is +2F, -2F or 3F and use sub command dial to change how much you want to shift exposure value for under and over exposed photographs.