Quote Originally Posted by davidave View Post
Yes modern light meters use foot candles. I use a Sekonic 758C and it uses foot candles.

I hope someone who actually understand the formula can offer some advice instead of people trying to say it's not useful; you're just making it for harder for other people to find out the answer. Just because you don't find it useful doesn't mean it's NOT useful.
The Sekonic 758c can make measurement in foot-candle but not candle / foot ^2.
the ft.cd is an illuminance measure or incident. the cd/ft^2 is a luminance value or reflective reading. It does however readout in cd/m^2 and foot lambert (FL).
I believe the confusion between foot candle and candle per foot squared led the original poster to come up with the exposure time of 1/8 second.