The Depth of Field calculator is based on a circle of confusion of standard photo viewing distances. This all get’s very complicated very quickly so I’ll break it down into what’s happening with each system.Ĭircle of confusion = the disc or cone of light a lens produces that is considered acceptably sharp or in focus. There is a lot more that goes on if you factor in sensor size, the circle of confusion and print size and this chart uses the industry-standard circle of confusion numbers. More on that late, but basically the numbers come from viewing a printed photo at a normal viewing distance, not the 100% crop of an image. This calculator is built with the industry numbers of what a general circle of confusion would be for each sensor size. There is a lot to consider when looking at depth of field with different sensor size and this calculator above doesn’t compensate for sensor resolution, printing or display size. You may notice that the depth of field gets shallower as you use smaller sensors with the same lens.
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