Best home theater projector 2018 4k9/4/2023 Dolby Vision is part of the company’s Dolby Cinema package, which includes the Dolby Atmos sound system and special theater treatments to reduce ambient light and enhance comfort. The system uses two Christie 4K laser projectors and puts out an image with luminance of 31 foot-Lamberts, more than twice as high as conventional projection (14 fL) and much higher than IMAX (22 fL). In 2015, Dolby Laboratories partnered with Christie Digital to develop Dolby Vision, a high-dynamic-range (HDR) projection system with 500 times the contrast ratio of other digital projectors: 1,000,000 to 1, compared to 2,000:1. Barco and Christie offer laser-illuminated versions of their 4K digital projectors. 4K systems have been widely accepted by the GS industry as suitable replacements for 15/70 film. Three manufacturers now provide digital cinema projectors using Texas Instruments’ 4K DLP Cinema chip (top to bottom): Barco, Christie, and NEC. Since 2005, digital projection systems have replaced nearly all film projectors in conventional multiplex theaters, and in more than half of all giant-screen theaters as well. The frame size is about 17.5mm high by 21mm wide (0.7 inches by 0.83 inches). The standard format formerly used in nearly all conventional movie theaters before the introduction of digital projection in 2008. Frame area is about 23mm high and 52mm wide (0.9 inches by 2 inches ), one third the size of the 15/70 frame. Rarely seen in theaters now, this was once the premiere format for high-quality conventional film production and exhibition. These film formats were used in most movie theaters for decades before the introduction of digital cinema in the early 21st century. Many manufacturers produced 8/70 projectors. The 8/70 format runs vertically, with a frame that is about 38mm high and 52mm wide (1.5 inches by 2 inches.) Because 8/70 uses about half as much film per minute as 15/70, shooting in 8/70 is less expensive and prints are about half the cost of 15/70 prints. Virtually all films presented in 10/70 theaters were originated in 15/70 and printed to 10/70. Known as Astrovision, 10/70 is found in theaters in Japan, China, India, and Bangladesh. Produced exclusively by Japan’s Goto Optical Manufacturing for its planetarium customers, 10/70 was optimized for projection onto a dome. was long the exclusive maker of 15/70 projectors and cameras, although a few other manufacturers briefly made 15/70 systems. It is slightly less than twice as large as 8/70. The 15/70 frame is almost nine times larger than the conventional 35mm frame (below). Each frame is 15 perforations wide, hence the term “15/70.” The area of the frame is about 52mm high by 70mm wide (2 inches by 2.75 inches). In all other LF and conventional formats, the film runs vertically, so that the width of the film is the width of the frame. Originally developed by Imax Corporation in 1970, this format uses 70mm film run through the projector horizontally, so that the width of the film is the height of the frame. We consider three film formats to be “large-format” or “giant-screen.” They are:
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