I was shooting a group of soccer players yesterday in front of a goal. I was using my PhaseOne DF+ and IQ250 with a Schneider 55mmLS lens. The ambient light was a brighter than I wanted so I decided to kill the ambient a bit with the use of leaf shutter lens. Camera settings were ISO 100, F10 @ 1/500th shutter. We checked the lighting with a Sekonic 478DR. The meter called for F14 across the entire 24 feet BUT according to my eye and histogram it was perfect @ F10. My question is: Can light meter readings be off considerably when using a leaf shutter lens in a high speed sync application.? My Sekonic is always spot on when using it in a non high speed sync application.
Ciao
Don