Describir: Calculations for stereo cinematography

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| \  / ||   / _ \\  | |  | ||  /_   _//   ____     |  ___||  /_   _// 
|  \/  ||  / //\ \\ | |/\| ||   -| ||-   |    \\   | ||__      | ||   
| .  . || |  ___  |||  /\  ||   _| ||_   | [] ||   | ||__     _| ||   
|_|\/|_|| |_||  |_|||_// \_||  /_____//  |  __//   |_____||  /__//    
`-`  `-`  `-`   `-` `-`   `-`  `-----`   |_|`-`    `-----`   `--`     
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   ___    
  / _ \\  
 | / \ || 
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  \___//  
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