Lux to EV Instructions
STEP 1: Enter the LUX as measured by a light meter. The Lux value must be between 1.25 and 926,819 Lux.
OUTPUT: This is the EV for the Lux value entered (rounded down).
EV to Lux Instructions
STEP 1: Enter the EXPOSURE VALUE (EV) as measured by a photographic light meter set for ISO100 film.
OUTPUT: This is the equivalent in LUX for the EV selected.