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===Wall 1889=== The common 1/100 inch CoC limit has been applied to blur other than defocus blur. For example, {{harvtxt|Wall|1889|p= [https://books.google.com/books?id=AkTTOsZEGLMC&pg=PA92 92]}} says: {{Blockquote|To find how quickly a shutter must act to take an object in motion that there may be a circle of confusion less than 1/100 in. in diameter, divide the distance of the object by 100 times the focus of the lens, and divide the rapidity of motion of object in inches per second by the results, when you have the longest duration of exposure in fraction of a second.}}
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