Quote Originally Posted by Ed Sukach

Now, that is interesting ... I wonder what "Industry Standard" Sekonic claims to use. The only accuracy claims I've ever seen were for the Pentax 1/21, plus or minus one half "stop"; and for the Gossen Ultra-Pro, plus or minus one-third "stop".
Sekonic claims 1/10 of an EV for the model I have. Well they claim

"Repeatable accuracy 0.1EV or less"

They also claim:

Calibration constant Reflected metering: K=12.5

OTOH Minolta claims:

Reflected light: K = 14
Repeatability 0.1 stops

I thought 12% was the standard.