This page contains links to charts of the minimum required camera-to-target distances that provide enough depth of field so that the amount of defocus blur with the target at the corners of the image when the camera is focused with the target centered is acceptable. In the case of these charts, the acceptable circle of confusion (CoC) is defined to be one-half the camera’s pixel pitch.
Micro four thirds cameras (13×17.3 mm sensors)
APS-C cameras (15.6×23.7 mm sensors)
Full Frame cameras (24×36 mm sensors)
Small medium format cameras. (33×44 mm sensors)