Bokeh (originally /ˈboʊkɛ/ˈboʊkeɪ/ BOH-kay — also sometimes pronounced as /ˈboʊkə/ BOH-kə, Japanese: [boke])
While we all know what bokeh is, we needn’t get into the technical discussions at this time in this article on the circle of confusion, but lets start to recognize the KINDS of bokeh and PROPERTIES of bokeh, and then at a later time identify the cause and natures of these lens “thumbprints” that render the art or lack thereof of the lenses we love or hate.
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Size, shape, distribution, and qualities/properties
Kinds of bokeh:
Cats eye
Bubble bokeh
Doughnut bokeh
Balled bokeh
Gaussian blur
Bladed, geometric bokeh
Aberrated bokeh (axial colored)
Nisen bokeh
Onion ring bokeh (generally viewed as ugly and distracting)
Below: Soap Bubble bokeh from the Zeiss Jena Tessar 50mm f2.8
Qualities and or Properties of bokeh:
Harsh, Geometric, distracting
Smooth, overlapping, buttery
Spectacular & overwhelming, strong
Mild & Muted
Muddy
Swirly, tunneling
Astigmatic or circular funnel bokeh
Below, the Cats Eye bokeh which is Swirly from the distracting Nikkor 105mm f1.4
Below, the Doughnut Bokeh from the Nikkor 500mm f8 mirror lens, also called catadioptric bokeh
Below: Aberrated bokeh from the 50mm 1.4 Takumar Pentax
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