Bokeh. Coarse bokeh on a photo shot with an 85 mm lens and 70 mm entrance pupil diameter, which corresponds to f/1.2 In photography, bokeh (Originally /ˈboʊkɛ/,[1] /ˈboʊkeɪ/ BOH-kay — also sometimes pronounced as /ˈboʊkə/ BOH-kə,[2] Japanese: [boke]) is the aesthetic quality of the blur produced in the out-of-focus parts of an image produced by a lens.[3][4][5] Bokeh has been defined as "the way the lens renders out-of-focus points of light".[6] Differences in lens aberrations and aperture shape cause some lens designs to blur the image in a way that is pleasing to the eye, while others produce blurring that is unpleasant or distracting—"good" and "bad" bokeh, respectively.[7] Bokeh occurs for parts of the scene that lie outside the depth of field.
Photographers sometimes deliberately use a shallow focus technique to create images with prominent out-of-focus regions. Origin[edit] Bokeh and lens design[edit] Bokeh characteristics may be quantified by examining the image's circle of confusion. Terminology - What is bokeh, exactly? - Photography Stack Exchange. Kiev Cameras. There is much written on the net about this elusive subject, and I won't attempt to provide the etymology of the word (is it Japanese or not?) To compete with it. Suffice to say that different lens designs have an effect on the appearance of the out-of-focus areas in photographs. Some photographic styles commonly use selective focus to bring the viewer's attention to the subject.
That means the subject is focused but the non-subject areas are not. If those unfocused areas are busy and distracting, the objective of bringing attention to the subject is lost. That's why portrait photographers in particular care about bokeh. There are a couple of myths about bokeh: Bokeh is controlled by the roundness of the lens diaphragm. Both of these are, at the very least, not the whole story, as we will see. An out-of-focus highlight will be represented as a disk. Some lens designs are associated with good bokeh, while others are associated with poor bokeh. Lenses Tested Test Scenarios. Www.zeiss.com/c12567a8003b8b6f/embedtitelintern/cln_35_bokeh_en/$file/cln35_bokeh_en.pdf. Kiev Cameras.