Is this correct or close?
Expose a sheet of film sandwiched together with a stouffer step wedge to an even light source in the camera over exposing by 5 stops. Read step 19 for zone 1 "speed" and step five for zone 8?
When using the densitometer do you zero on the light without the exposed film or zero on the actual film base?
Anyone use this method to get a film speed? And zone 8. Care to share your full methodology?