Hello,
The camera settings for the DOF in Cycles seems correct (f/stop values are relevant and close to reality) but the viewport DOF is completely off.
I know that the f/stop used for the viewport is separated from the one used in Cycles, so I set them properly.
With a f/stop of 128, I still get some stuff blurred, while everything should be sharp. Setting it to f/8 gives me a depth of field as small as a couple of millimeters. My camera is at 1.3 meters from my 40 cm object, so that is not a scale issue. And Cycles renders proper DOF at f/5.6.
Do you have the same thing?
Thanks.