I was always under the impression that the only factors affecting depth of field (DOF) were the focal length of the lens, the aperture used, and the point of focus distance. DOF is independent of format size, film or digital.
Imagine my suprise then when, this weekend, I opened a landscape photography supplement from one of the big magazines to find an article on (DOF) which showed two tables for hyperfocal distance, one for full size sensors and one for APS-C sized sensors.
For a 50mm lens at F8 one table gives a hyperfocal distance of 55ft, the other 35ft. If I fit a digital back with a 645 sensor to my 5x4 camera, why should that change the DOF characteristics of all my lenses? Am I missing something
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