My question is, basically, if I were to use an aps-c camera (23.6mm width) with a 35mm camera (53.55mm equivalent) at f/4 (f/6.12 equivalent) do the settings go:
Sensor width: 23.6mm Aperture: f/4 Focal Length:35mm
Or:
Sensor width: 23.6mm Aperture: f/6.12 Focal Length:53.55mm
or some other combination I haven't thought of?