Quoted By:
Here are my notes on times beyond 1 second
>Rollei INFRARED 400 Reciprocity
1 - 1-2 sec
2- 3-4
4 - 8
8 - 24
15 - 60
30 - 180
Someone more math than me pls make a non-linear curve or whatever it's called to extend times beyond this. Or whatever power factor can be used.