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TV Tech
TV Tech
George Winslow

SMPTE Committee Conducts `Circle of Confusion’ Test

Left to Right: Valentin P. Alt, AC/DIT; Danna Kinsky, Camera Assistant; Snehal Patel, Director/Producer at FearlessProductions.tv and Committee Leader for the Camera and Lens Metadata Committee; Dave Stump, ASC BVK; Rob Hummel, Photographer; Phil Holland, Cinematographer/Image Scientist; and Joe di Gennaro, Stage.

WHITE PLAINS, N.Y.—SMPTE and members of its Rapid Industry Solutions, On-Set Virtual Production (RIS-OSVP) initiative recently orchestrated a camera and lens measurement study to test and validate the optical model for accurately determining the circle of confusion and the near and far focus planes.

The circle of confusion is the blur circle formed when a point source of light (like a star or a distant point) is out of focus. Instead of a sharp point, it appears as a small circle on the image plane. Filmmakers can manipulate this phenomenon to create stunning visuals. Understanding and accurately modeling the circle of confusion can help those in postproduction to create visual effects that match the visual quality and tone of live-action footage, SMPTE reported. 

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