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===IMAX (15/70)=== {{main|IMAX}} * spherical lenses * 15 perforations per frame * horizontal movement, from right to left (viewed from base side) * 24 frames per second * ''camera aperture'': 70.41 by 52.63 mm (2.772 by 2.072 in) * ''projection aperture'': at least 2 mm (0.080 in) less than camera aperture on the vertical axis and at least 0.4 mm (0.016 in) less on the horizontal axis * ''aspect ratio'': 1.35:1 (camera), 1.43:1 (projected)
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