Depth of Field and Stereoscopic 3D:
Understanding the effects of Depth of Field and it’s effect on stereoscopic 3d imagery and more importantly the effect it has on audiences minds is something that has not been researched or studied well. DoF is an important tool in 2D Cinematography and in-fact is much coveted as it’s one of the big things that gives a feature Film…it’s “film look”. To explain it briefly, in the picture above the Cat or object B is what is in sharp focus on the camera sensor, or as an analogy, the retina of the eye. The images of the rabbit and the dog do not come into sharp focus and only parts of it are in focus, and rapidly become un-sharp. The “circle of confusion” is thus illustrated in the image above.
When watching such an image in 2D, it helps the Cinematographer or director to direct the attention of the viewer to the area that is in sharpest focus. Try this in a stereoscopic 3D image, and you will create eye-strain in viewers eyes, as the powerful optical illusion that is “3D” forces the brain to send commands to the eyes to try and “fuse” the un-sharp areas. To the brain, a stereoscopic 3D image is after all… similar to the real world.
Trying another 2D Cinematic technique, …
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