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Dose Celluloid have problems with Moiré Patterns?


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No. The film grain pattern is too random. You won't have issues with moire as you might with a digital camera where it's a grid shooting a grid.

However, if you are shooting mosquito nets or something where there is moire visible to the eye, it will appear on film, too, of course.

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Moire is just the interaction of fine lines in the image with the grid pattern of various stages in digital distribution -- and those patterns (scanner, monitors, etc.) vary a lot in terms of resolution. It's very hit or miss and often when you do see the moire, it is happening for that particular monitor resolution, it's not in the digital master.  At the scanning / telecine stage, there are anti-aliasing filters that can reduce the chance of the image itself creating moire patterns on the scanner but as we tend to work at higher resolutions these days, there is less chance of moire appearing from a film scan.  In general, it's not something to worry about when shooting film unless you've got some thin venetian blinds in focus right behind an actor.

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Slightly offtopic but related. Due to mishap, some archived early generation videotape British TV shows in colour were lost. Some time back, old B/W filmed distribution copies were discovered in an African TV broadcast station, in Nigeria I think. In playing them via modern telecine, it was discovered that traces of colour were appearing. Apparently the resolution of the film was just sufficient to have also captured the unique moire pattern of a PAL colour TV image which carries the colour information. With some R and D effort and the power of modern digital technology, it was apparently possible to recover in colour, the original coloured versions of the shows.

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Slightly offtopic but related. Due to mishap, some archived early generation videotape British TV shows in colour were lost. Some time back, old B/W filmed distribution copies were discovered in an African TV broadcast station, in Nigeria I think. In playing them via modern telecine, it was discovered that traces of colour were appearing. Apparently the resolution of the film was just sufficient to have also captured the unique moire pattern of a PAL colour TV image which carries the colour information. With some R and D effort and the power of modern digital technology, it was apparently possible to recover in colour, the original coloured versions of the shows.

Here's a wiki page on it .... https://en.wikipedia.org/wiki/Colour_recovery

John S ?

Edited by John Salim
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