Diaphragm (optics)
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In optics, a diaphragm is a thin opaque structure with an opening at its center. The role of the diaphragm is to stop the passage of light, except for the light passing through the aperture. Thus it i
Pentacon 2.8/135 lens with 15-blade iris
Aperture mechanism of Canon 50mm f/1.8 II lens, with five blades
In the human eye, the iris (light brown) acts as the diaphragm and continuously constricts and dilates its aperture (the pupil)
Smooth Trans Focus
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The Smooth Trans Focus technology in photographic lenses uses an apodization filter to realize notably smooth bokeh with rounded out-of-focus highlights in both the foreground and background. This is
Smooth Trans Focus with bokeh discs
