Using light meter
I am using a Pentax 645Z with two 540 flashes.
I'd like to use my Sekonic light meter to set up my shots with both flashes but it is giving me some unusual readings.
I set up the system for say 1/60 f/8 manually by adjusting the flash outputs until I have a good exposure on the camera. But when I trip the flashes and use the meter, it gives me a very low f-stop reading and not the 1/60 f/8. And when I change the power on the flashes using the Cactus, the reading on the meter does not change. Does the power setting on the cactus change the TIME of the flash duration and not true power? That would explain the same readings on the meter.
I have tried two meters with the same results.
Additionally, when I take the flash to manual and use the Cactus to simply trip the flash, the readings obtained on the meters are correct...and the f-stop changes accordingly with changing the flash power manually. And the readings for a good exposure on the meter match the results of the camera.
So how does the Cactus control the power on the flash? By time or intensity? So how can one use a light meter with the Cactus system? I should not be in HSS with the system set at 1/60