be averse to an optical conversion stage. VistaVision The VistaVision motion picture format was created in 1954 by Paramount Pictures to create a finer-grained negative and print for flat widescreen films. Similar to still photography, the format uses a camera running 35 mm film horizontally instead of vertically through the camera, with frames that are eight perforations long, resulting in a wider aspect ratio of 1.5:1 and greater detail, as more of the negative area is used per frame. This format is unprojectable in standard theaters and requires an optical step to reduce the image into the standard 4-perf vertical 35 mm frame. While the format was dormant by the early 1960s, the camera system was revived for visual effects by John Dykstra at Industrial Light and Magic, starting with Star Wars, as a way of reducing granularity in the optical printer by having increased original camera negative area at the point of image origination. Its usage has again declined since the dominance of computer-based visual effects, although it still sees limited utilization. Perforations BH perforations Film perforations were originally round holes cut into the side of the film, but as these perforations were subject to wear and deformation, the shape was changed to what is now called the Bell & Howell (BH) perforation, which has straight top and bottom edges and outward curving sides. The BH perforation's dimensions are from the middle of the side curve to opposite top corner by in height. The BH1866 perforation, or BH perforation with a pitch of , is the modern standard for negative and internegative films. KS perforations Because BH has sharp corners, the repeated use of the film through intermittent movement projectors creates strain that can easily tear the perforations. Furthermore, they tended to shrink as the print slowly decayed. Therefore, larger perforations with a rectangular base and rounded corners were introduced by Kodak in 1924 to improve steadiness, registration, durability, and longevity. Known as "Kodak Standard" (KS), they are high by wide. Their durability makes KS perfs the ideal choice for some (but not all) intermediate and all release prints, and original camera negatives which require special use, such as high-speed filming, but not for bluescreen, front projection, rear projection, or matte work as these specific applications demand the more accurate registration which is only possible with BH or DH perforations. The increased height also means that the image registration