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Frame-Index Marker(35 mm only) Hyphen that occurs every four perforations to help locate position of frame line, especially in low-light level scenes. To use: Locate frame line. Determine whether it is offset from inde [..]
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Frame-Index Marker(35 mm only) Hyphen that occurs every four perforations to help locate position of frame line, especially in low-light level scenes. To use: Locate frame line. Determine whether it is offset from index marker by 0, +1, +2, or +3 perforations. Use this offset to find frame line elsewhere in scene. Note: The frame-index marker is not printed when it [..]
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