BS ISO 4241:2019 pdf download – Cinematography — Projection film leader (time- based), trailer and cue marks — Specifications This document specifies the makeup or assembly of time-based leaders and cue marks for 70 mm,35 mm, and 16 mm motion-picture release prints. NOTE Extraneous materials are dealt with in Annex A. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 4238:1976, Cinematography — Optical printing ratios for enlargement and reduction of motion-picture film images — Specifications 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at http://www.electropedia.org/ 4 Reduction ratio The reduction ratio in the production of the head and foot leaders from 35 mm motion-picture film to 16 mm motion-picture film shall be in accordance with ISO 4238. 5 General specifications 5.1 Orientation and dimensions of letters and numerals in this document are with respect to 35 mm motion-picture films and are modified proportionally in accordance with ISO 4238 for 70 mm and 16 mm prints. 5.2 Information appearing in the leader which is printed lengthwise (in the direction of film travel) shall read from left to right when viewed from the projection lens towards the projector light source with the head end of the film at the right. Information appearing in the leader which is printed upright shall read normally when the reel is uppermost and the head of the film hangs down ready for threading (see Figures 1 and 5 for orientation of information). 5.3 All frames in the head-leader and trailer-leader identification sections (see 6.3 and 8.3) and in frames 1 through 171 of the head-leader synchronizing section (see 6.4) shall be masked to the nominal anamorphic projection aperture [20,95 mm (0,825 in) × 17,53 mm (0,690 in)] with clear framelines nominally the height of anamorphic projection aperture framelines [1,55 mm (0,061 in)]. Frames 172 through 218 of the head-leader synchronizing section and frames 1 through 87 of the 6.2 Splicing frame A single frame with the upright words “SPLICE HERE” and an arrow pointing to the...
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