Canon 5D Mark III Experience

Figure 102 - Multiple Exposure Mode menu to set up the parameters and processing options of in-camera Multiple Exposure shooting and image results.

The multiple exposures can be processed in several different ways to achieve the final single-image result, using Multi-expos ctrl.

Additive setting is most similar to shooting multiple exposures with film, where the total exposure is the cumulative exposure of each of the individual frames - in other words, they are all added together. This could result in a very dark image, so it is typically best to under expose each frame to a degree so that when they are combined, the cumulative result is a properly exposed image. Under expose

0.5stop per exposure. For example with five exposures, under expose by 2.5 stops (-2.5 EV) for each individual exposure. Or vary the exposure of each shot to obtain your final desired result.

Average setting offers automatic exposure adjustment. Each individual frame will be underexposed the proper amount so that the final stacked image has the correct exposure. However, to determine the final exposure, the “total” exposures of all the frames will be averaged and individual frames will each be under exposed the same amount. If you would like to vary the exposure amount from frame to frame, you will need to use Additive. Basically, the camera is automatically applying the “-0.5 stops per image” underexposure formula of above.

Bright setting is used to photograph images of dark scenes containing bright objects, for example a bright moon in a dark sky. With this setting the bright objects will remain properly exposed and visible in the final stacked image, as they are “overlayed” over the dark areas (see Figure 103).

Dark setting is used to eliminate the bright areas of the images, as the dark areas will be “overlayed” over the bright areas.

146