The use of limited DOF to emphasize one part of an image is known as " selective focus ", " differential focus " or " shallow focus ".
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The Pentax Q has a wide range of digital effects and controls including High Dynamic Range ( HDR ), multiple scene modes, and a bokeh function which, when activated, can enable a pseudo shallow focus effect.
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It is often proclaimed by some to being a way to avoid the " video look . " Extremely shallow focus sometimes called " bokeh porn " made its debut in cinematography in 2008 with the release of the Canon EOS 5D Mark II and the start of DSLR Cinematography.
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The parabolic mirror, probably the same one that Della Porta had had constructed in Venice in 1580, which had produced some sensational effects and led to the development of the camera obscura, was probably no larger than an eye-glass, but it made it possible to make a mosaic of naturalistic images that was extremely compelling; the technique also explains the shallow focus of Caravaggio s compositions.
