Photography Asked by AlienBoy on August 18, 2021
I’m trying to utilize cross-polarization to eliminate reflections on objects. I use linear polarizing filters on multiple light sources (polarized lights are my only light sources, no bounce lights) and a circular polarizer filter (CPL) on the camera lens to achieve cross-polarization. The object is on a turntable so I can shoot 360 photos without moving the camera around.
I’m using Canon EOS 5D Mark IV, 24-105 mm & 16-35 mm zoom lenses, with 4+ 1000W tungsten lights. I’m currently at the testing phase, I will eventually scale the whole setting up for objects as large as 10 feet wide.
I’ve lined everything perfectly so there are no reflection on even somewhat glossy objects. After that I start to move the camera on the vertical plane (up and down) and tilting the aim angle to aim at the object, I don’t move the lights, only the camera.
Here are the issues I ran into when I do so:
I would like to know how the above happen and how to solve these issues. Also, any practical suggestions on how to do a larger version (10 feet wide) of the setup while still maintaining cross-polarization across the subject, preferably with multiple light sources & multiple cameras (angles)?
Thanks in advance!
Anytime you move the camera, the angles between each light, the subject, and the camera will change by differing amounts. Thus the filters on the lights must each be adjusted to compensate for the different angles.
Answered by Michael C on August 18, 2021
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