Lunch atop a (Springfield) skyscraper

Lunch atop a (Springfield) skyscraper
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Depth of Field: We adjust focus to a specific distance to obtain a sharp image. Practical experience reveals that objects before and after the distance focused upon, reproduce acceptably sharp. This zone of acceptable focus is what we call depth-of-field (DOF). What determines if an image is acceptable as to sharpness? The lens projects an image of the ...


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"Focus Area" as you call it can also be called the Depth of Field. f/1.8 will always give a very narrow depth of field and would not be desirable for large groups of people. From 10 feet away only an area 1.68 feet would be in focus when using a 35mm lens on a crop camera body. Depth of Field calculations can be complex, and will always vary with the ...



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