How does Canon 5d3 shoot multiple exposures?

The multiple exposure times of Canon 5D III's multiple exposure function are 2-9 times, and there are four image overlapping modes: additive, average, bright and dark. In fact, the multiple exposures of 5D3 can be divided into two types, one is the function/control priority mode, and the other is the continuous shooting priority mode. In the function/control priority mode, 5D3 will record each exposure separately, and finally merge all exposure data.

In continuous shooting priority mode, 5D3 is no longer stored separately, but the information obtained from each exposure is directly superimposed in the processor to make photos according to the final data. This is a bit close to the multiple exposures of the original film. In the first mode, each exposure can be saved as a single photo, and the photographer can also view the image during multiple exposures. The second mode, which may only have the final photos, is more suitable for rapid creation because it can't view and control the captured images during the process of continuous shooting. Function/control priority is more suitable for planned accurate shooting.

Multi-exposure control Turn the dial to select the "Multi-exposure control" option. There should be four options at this time, including "plus", "bright" and "dark". This menu selects the algorithm when synthesizing multiple exposure photos.

Addition-Select this option, and each single exposure photo will be superimposed together, just like the film age.

Average-Select this option to automatically control the exposure of the background every time a single exposure photo is taken to obtain a standard exposure result.

Bright-Select this option to keep the bright part of the multiple exposure results in the photo. For example, when shooting the moon, select this option to get a picture of Zhang Mingyue hanging high above the night scene.

Dark-This option is just the opposite of the "light" option, which can keep the dark parts in the results of multiple exposures when shooting. This is a very important option, which needs to be described in detail here: "addition" means simply superimposing multiple images like a film camera. Because there is no exposure control, the synthesized photos are brighter than those before synthesis, which requires simple estimation before shooting and appropriate reduction of exposure compensation, otherwise overexposure is more likely to occur. "Average" controls the brightness of photos when synthesizing, automatically compensates the number of photos taken by multiple exposures, and adjusts the synthesized photos to the appropriate exposure. Compared with more automation and intelligence. Select "addition" or "average", and you can also obtain the soft focus effect of multiple exposure shooting by changing the focus position.

The remaining "light" and "dark" are only the lighter (dark) parts of the basic image compared with the image synthesized on it, which are suitable for image synthesis that wants to emphasize the outline of the subject. It is suitable for the creation of subjects with obvious relationship between light and shade, which makes the subjects more vivid and clear. In the option of exposure times, you can set the exposure times when shooting with multiple exposures, and you can choose 2~9 exposures to shoot in 5D Markⅲ Ⅲ.