Various agencies have conducted tests of their own to find the ideal frame rate for cinema.
-Thomas Edison believed that 46 fps was the minimum for strain-free vision.
-James Cameron believes shooting in 60fps will heighten the sense of reality for stereoscopic film.
-Douglas Trumbull, the developer of Showscan, discovered that as the speed of projection ramped up, so did the emotional response, peaking at 72 fps. In fact, movies shot on 24 fps are usually projected at 48 fps or 72 fps.
-BBC Research had successfully demonstrated in 2008 that increasing the frame rate can significantly improve the portrayal of motion even at standard definition. Their tests were conducted by shooting 300 fps on a Phantom V5.1 camera, but displayed at 100 fps on a Christie Mirage S+4K projector due to limitations in display technology.
The maximum fusion frequency for rod-mediated vision is about 15 Hz. The maximum fusion frequency for cone-based vision is about 60Hz. This corresponds to between 30 to 120 fps.
Takeaways:
-Through EEG, we know that beta waves lie between 13 to 30 Hz, which corresponds to 25 to 60 Fps.
-Through phi phenomenon and beta movement, the maximum fusion frequency of the eye corresponds to 60 Hz, or about 120 fps.
-Practical testing by eminent agencies have shown that the frame rate must be above 60 fps, and even above 100 fps to take full advantage of the high spatial resolutions.