Bokeh
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In photography, bokeh is the aesthetic quality of the blur produced in out-of-focus parts of an image, whether foreground or background or both. It is created by using a wide aperture lens.
Coarse bokeh on a photo shot with an 85 mm lens and 70 mm entrance pupil diameter, which corresponds to f/1.2
An example of a portrait photo (of Katherine Maher). Note the 'swirly' bokeh.
How the bokeh varies with the aperture
An extremely shallow depth of field, a common effect in macrophotography, emphasizes bokeh.
Anamorphic format
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Anamorphic format is a cinematography technique that captures widescreen images using recording media with narrower native aspect ratios. Originally developed for 35 mm film to create widescreen prese
Bokeh
…Trioplan f2.9/50, a new lens based on one originally produced by Hugo Meyer & Co.; both lenses exhibit a characteristic "soap-bubble" bokeh. The use of anamorphic lenses will cause bokeh to appear differently along the horizontal and vertical axes of the lens, becoming ellipsoidal compared to those in a spherical…
Anamorphic lens illustration with stretching
Figure 1. Shooting without an anamorphic lens, in widescreen picture format on 4-perf film; some of the upper and lower film surface area is wasted on the frame lines.
Example of blue-line horizontal anamorphic flare