Cinema slides
Cinema slides are analog or digitally exposed positive films ( photographic film ) which are shown in cinemas for advertising purposes .
Slide exposure
Since cinema slides almost always contain text in the image and the templates are of course created on the computer today, a special device is required for digital exposure (the slide recorder). A slide recorder works in a similar way to a slide scanner , but works in the opposite direction. Instead of scanning an existing slide or negative line by line, the slide recorder exposes the image file supplied by the computer line by line onto the film.
Slide scanners and slide recorders have a very high resolution in common. With the 35mm slide recorder, 4096 lines are common on the long side of the 24 x 36 mm slide. For particularly high demands, there are also imagesetters with twice the resolution, which mathematically would correspond to a digital camera with 45 million pixels. Due to the rapid advance of projectors , the market is no longer interesting for manufacturers. Despite the very high image quality, slide recorders are only available as used devices.
Formats
There are 5 × 5 (also mini-scope) and SCOPE cinema slides. The external dimensions of mini-scope cinema slides correspond to conventional 35 mm slides and measure 50 × 50 mm with a glass frame. SCOPE cinema slides are medium format slides which, with a glass frame, have an external dimension of 85 × 85 mm.
presentation
In Switzerland the duration of a cinema slide is 7 seconds. Cinema slides are gradually being supplanted by digital cinema advertising . New products are cine pictures (still pictures with or without soundtrack) or cine motions (moving, animated short advertising films with a duration of 10 or 15 seconds).