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Adding DoF would mean more of the scene is sharp. A blurred background = decreased DoF
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coneslayer
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How does a camera add artificialartificially decrease DoF toof a shot from a single position?

edited tags; edited tags
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mattdm
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user681768917
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How does camera add artificial DoF to a shot from single position?

Some cameras with small sensors can artificially blur image background provided there's an object in the foreground. FujiFilm calls it Pro Focus filter.

I'm not sure if the camera makes one or two shots consecutively, X-30 seems to play the "shot sound" twice.

As you don't change the lens position, how does the camera know what is background and should be blurred?

(The background is probably already very slightly blurred but it also contains a noise that may make it indistinguishable from foreground surfaces.)

Normal shot and a shot with the Pro Focus effect