Services - Cinematography Tools - Illumination for Correct Exposure Guide

Illumination Required (in Footcandles) for Correct Exposure at 1/50 Second
Exposure Index   T1.4 T2 T2.8 T4 T5.6 T8 T11 T16
25   100 200 400 800 1600 3200 6400 12800
40   62.5 125 250 500 1000 2000 4000 8000
64   40 80 160 320 640 1280 2560 5120
100   25 50 100 200 400 800 1600 3200
125   20 40 80 160 320 640 1280 2560
160   16 32 64 128 256 512 1024 2048
200   12.5 25 50 100 200 400 800 1600
250   10 20 40 80 160 320 640 1280
320   8 16 32 64 128 256 512 1024
400   6.25 12.5 25 50 100 200 400 800
500   5 10 20 40 80 160 320 640
                   
NOTE: Film Tests Should be Used to Verify Results