Film Technology

 Film technology

 CGI

• At the most basic level, Computer-Generated Imagery (CGI) is the creation of still or animated visual content with computer software. CGI most commonly refers to the 3D computer graphics used to create characters, scenes and special effects in films, television and games. The technology is also used in everything from advertising, architecture, engineering, virtual reality and even art.

• CGI is used extensively these days because it is often cheaper than physical methods which rely on creating elaborate miniatures, hiring extras for crowd scenes, and most commonly for when it's simply not safe or humanly possible to create the visuals

• CGI is created using a range of different methods. The use of algorithms can produce complex fractal patterns. 2D pixel-based image editors can create vector shapes. 3D graphics software can create everything for simple primitive shapes to complex forms made from flat triangles and quadrangles. 3D software can even simulate the way light reacts to a surface and generate particle effects.

70mm

• An anamorphic squeeze combined with 65 mm film allowed for extremely wide aspect ratios to be used while still preserving quality. This was used in incredible success in the 1959 film Ben-Hur and the 2015 film The Hateful Eight, both of which were filmed with the Ultra Panavision 70/MGM Camera 65 process at an aspect ratio of 2.76:1. It required the use of a 1.25x anamorphic lens to horizontally compress the image, and a corresponding lens on the projector to uncompressed it.

• Limited use of 65 mm film was revived in the late 1970s for some of the visual effect’s sequences in films like Close Encounters of the Third Kind, mainly because the larger negative did a better job than 35 mm negative of minimizing visible film grain during optical compositing.

  IMAX

• The screen is 4500 times bigger than an average TV screen.

• The film is strong enough to pull a truck.

• A 2D IMAX camera weighs approximately 80 pounds. That means if wildlife shows up, you can’t grab a camera and follow it as you can with video or 16mm. The 3D IMAX camera is the size of a hotel mini-bar refrigerator and weighs 265 pounds.

• Light from the 15,000-watt lamp in an IMAX projector is so bright that if it were on the moon we could see it from earth with the naked eye.

• If a large log were held in front of the light beam from the projector, it would spontaneously combust.

• The l5/70 film frame used by the IMAX projection system is 10 times the size of a conventional 35mm frame.

• Sonics Proportional Point Source (PPS) loudspeaker system was specifically designed for IMAX theatres. The system typically uses 44 laser focused speaker drivers located throughout the theater to fully envelope the audience.