I have what is probably a very basic question regarding footcandles/lux.
I'd like to know how to calculate required exposure based on a light's given footcandles/lux information using a fixed iso and shutter speed and variable aperture.
For example, if I have a digital camera set at 800 ASA and 1/48 shutter and my light puts out 44 footcandles at 6ft, and the light is exactly 6ft from my subject, what aperture is required to properly expose this subject? There is most probably a basic calculator out there, if anyone can point me to one that'd be great.
I basically want to know because I have an upcoming project with an option of lights that I will not have experience with before the shoot, so I'd like to know in advance their capabilities.
Edited by Justin Carrig, 31 August 2012 - 11:40 PM.