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IMAX
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==Technical specifications== '''IMAX (15/70)''' * [[spherical lens]]es * [[70 mm film]], 15 perforations per frame * horizontal rolling loop movement, from right to left (viewed from emulsion side) * 24 frames per second * ''camera aperture'': {{convert|70.41|x|52.63|mm|in|abbr=on}} * ''projection aperture'': at least {{convert|2|mm|in|abbr=on}} less than camera aperture on the vertical axis and at least {{convert|0.41|mm|in|abbr=on}} less on the horizontal axis * ''aspect ratio'': 1.43:1 * ''DMR aspect ratio: 1.90:1, 2.39:1'' '''IMAX Dome/Omnimax'''{{Clear}} ''Same as IMAX with the addition of'': * [[fisheye lens]]es * lens optically centered {{convert|9.4|mm|in|abbr=on}} below film horizontal center line * projected elliptically on a dome screen, 20Β° below and 110Β° above perfectly centered viewers
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