Quote Originally Posted by 2F/2F View Post
The dome, covering 180 degrees, takes that flare/spill into consideration. This is why I prefer it to the disc for measuring lighting ratios.
The dome can't "see 180 degrees" 2F/2F because it can't see behind the meter body, there were however in the late 1950s a proposed version of Western Master meters with two hemispherical receptor domes one facing forward, and one back to take 180 degree light into consideration in one reading that was never manufactured, but this Duplex method can be achieved by taking two readings one in each direction and averaging them .