In the picture above, taken at f8, if you look carefully, you can see that the highlights have eight sides ( click here to see the image enlarged). It is this which forms the shape of the most prominent highlights. Instead the blades form a shape which has sides corresponding to the number of blades. At other aperture sizes the iris blades form the shape of the aperture and they do not form a perfect circle. In some photographic lenses when the aperture is at its widest the iris is withdrawn behind the circular fixed aperture set into the diaphragm. The nature of the blurīokeh tends to form a circle only when the aperture is at it widest. The highlights are only more prominent because of the intensity of the light that created them. Many people assume that these highlights are the bokeh. Bokeh is often visible around strong highlights like light sources. All the bright highlights are shown as ‘circular’ spots (except the ones that merge or were moving lights). The picture above was taken, out of focus, with an eight second exposure at night. Consequently, as a controllable aspect of photography it is a way to affect the viewers understanding of the image. In either case it creates an atmosphere and can modify the content of the picture in a positive or negative way. Good quality blur can be a very pleasing part of an image, or it can be simply of no interest. This points the attention of the viewer to the area of the picture in focus, Thus, the important aspects of the image are emphasised. Photographers frequently create shallow focus so the out-of-focus area of the image does not draw the eye. Manufacturers therefore expend research and development resources to ensure that the bokeh produced by a lens is pleasing.īokeh is an important component of photographic composition. Photographic lenses that create more pleasing blur have higher sales value. This combination of factors may create blur that is pleasing to the eye, or not. Its shape, any optical aberrations it exhibits its situation in the photographic lens-set, the aperture and its shape, all affect the shape of the tiny circles that form bokeh. The bokeh that any individual photographic lens creates is the result of the unique characteristics of that particular lens. Its shape determines the shape of the light beams that are focused on the image sensor. The aperture forms the shape of the circles of confusion. The lens creates out of focus areas of the image when the circle of confusion is large enough to cause the sharpness to be lost. The blur is created by a combination of the lens and aperture setting resulting in part of the image being out of the depth of field. This Japanese word meaning blur or haze is pronounced BOK-kay. The way the lens renders individual points of light that are out of focus, and the quality of the blur, is ‘bokeh’. In photography anything that is outside the ‘ Depth of Field‘ will be blurred. The shapes are not quite circular.Ĭlick to view large and see the highlight shapes clearly. Out of focus lights on the London’s South Bank Arts Complex. Swirly bokeh in the background Swirly bokeh Bokeh can be simulated by convolving the image with a kernel that corresponds to the image of an out-of-focus.‘Southbank Bokeh’. In photography, bokeh (/ˈboʊkə/ BOH-kə or /ˈboʊkeɪ/ BOH-kay Japanese: ) is the aesthetic quality of the blur produced in out-of-focus parts of an. With a 64-megapixel main camera, 8-megapixel wide-angle camera, 2-megapixel bokeh and 2-megapixel monochrome sensor, it feature a 48-megapixel front camera.įocus technique to create images with prominent out-of-focus regions, accentuating their lens"s bokeh. The image in a way that is pleasing to the eye, while others produce distracting or unpleasant blurring ("good" and "bad" bokeh, respectively). Highlight or emphasise a single point in an image, create an atmospheric bokeh, or miniaturise an obliquely-viewed landscape. ThinBasic Journal #1, July 5, 2008, PDFThinBasic Journal #2, November 26, 2008, PDFMovieFX: Combining photo with 3D object, September 1, 2010MovieFX: Blending based bokeh, January 1, 2011ThinBasic review at basics. Photographers sometimes refer to the aesthetic quality of the unfocused area(s) as bokeh.įeature a triple rear camera with a 48-megapixel main camera, 2-megapixel bokeh lens, and an AI sensor, it feature an 8-megapixel front camera. "Good" bokeh is especially important for macro lenses and long telephoto lenses, because. The details of bokeh in the resulting blur are accordingly also a consideration some lenses.
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