1.
- To create rack focus, you set the camera to a very low aperture, zoom in, and shift the focus of the video from the background to the foreground using manual focus or vice versa.
- It is used in film to transfer the focus from one person to another or to shift attention from one thing in a scene to something else.
2.
- To create in and out of focus, you start a scene completely out of focus, so using a larger aperture, and then slowly make it go into focus or vice versa.
- This is used in film to create confusion at first and then show understanding and also to set a scene by revealing where a scene is taking place and who is in it.
3.
- To create the bokeh effect, you again set a low aperture, zoom in, and make sure the lights in the photo are out of focus while the subject, if there is one, stays in focus. The low aperture and dark environment makes the lights blurry and interesting.
- Bokeh is primarily used as a cool effect in video to set a mood. It gives enchantment to a scene and sets time because it usually can only be achieved at night.
4.
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