Fall 2023 Lighting I: Lesson One: Inverse Square Law

Fall 2023 Lighting I: Lesson One: Inverse Square Law:

Using 3 identical 4x5" grey cards, set 1 foot apart and slightly overlapping, make four photos of the cards with light source 2 ft, 4 ft, 8 ft, and 16 ft from the middle card. 

Cards panel surfaces need to be angled to avoid specular highlights/reflections from the light source. 

Use an incident light meter on the middle card for exposure reference. Middle card in all four shots should have same RGB value, ideally 50% in Lr or around 128 (127.5 rounded) in Ps 8-bit scale sRGB colorspace/profile. 

Crop and combine all four photos together in one image like the one below. Show the light-to-middle-card distance, camera exposure values, Lr/Ps exposure adjustments, below each photo.

Lighting Diagram

production documentary photos

challenges, troubles, solutions

the computer at the studio wasn't working right. finally, we found Youtube videos and followed the instructions step by step for the rest of the shootings.