[potterm]

Originally Posted by vandergus

The mistake that he makes is assuming that DoF is concerned with how much detail is being resolved on the sensor/film. In that case, no, the size of the film/sensor doesn't matter. But that isn't consistent with the definition of DoF. DoF is concerned with the apparent sharpness in the final print, so magnification must be taken into account. It's not about resolution, it's about what appears to be sharp. Small films/sensors are magnified more than large sensors/film so the DoF is different.

I'm sorry, I don't know how to explain it any more than that. I think you'll just have to do a lot more reading on the subject, from multiple sources, and perhaps you'll come to a different conclusion.

Seems pretty clear to me, and completely logical.