Those 10,000 lumen LEDs that are offered for pre-order are only $25. You won't be charged until the lights are shipped. B&H does business the same way.
Printable View
Those 10,000 lumen LEDs that are offered for pre-order are only $25. You won't be charged until the lights are shipped. B&H does business the same way.
Set the shutter speed to the reciprocal of the number the needle points at; e.g., if it points to 25 c/sq.ft. set the shutter to 1/25 sec. Having established the combo of shutter speed and f/stop, it's a simple matter to adjust the shutter speed for any other f/stop.
If using a Weston master why not just transfer the reading to the exposure calculator?
It is the reciprocal, and you want the square root of the arithmetic film speed. And right Weston meters indicate candela per square foot. Shutters mostly leave off the 1/ . If there is time the exposure calculator is useful.
But the exposure formula is easy to use in a pinch:
Set the f/stop at the square root of film speed and set the shutter to whatever the meter needle points at.