Aperture, often represented by an “f/” followed by a number, controls the depth-of-field (how blurred the background is, also known as Bokeh). The smaller the number is, the larger the aperture value gets, and the more blurred the background turns.
In a professional DSLR, the lens could reach as large an aperture as f/1.1. As for photography phones, f/1.8 – f/2.2 is enough for creating decent bokeh for portrait photos.
By switching to the portrait mode on the vivo V20 series, it automatically produces background blur either in the selfie or rear cameras. The blur looks pretty consistent even in the in-between areas.
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