# Simple Super-8 Sprocket Registration

**URL:** <https://forums.kinograph.cc/t/simple-super-8-sprocket-registration/1683>\
**Category:** Software\
**Created:** [March 17, 2020, 3:38pm UTC](https://forums.kinograph.cc/t/simple-super-8-sprocket-registration/1683 "2020-03-17T15:38:21Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![cpixip](https://forums.kinograph.cc/user_avatar/forums.kinograph.cc/cpixip/32/852_2.png) [@cpixip](https://forums.kinograph.cc/u/cpixip)\
**Post date:** [March 19, 2020, 2:15pm UTC](https://forums.kinograph.cc/t/simple-super-8-sprocket-registration/1683/3 "2020-03-19T14:15:45Z")

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@friolator - hey, that is an interesting observation. Note that this example film has probably never seen a camera. It comes from an advertizement reel for Super-8 copies of 35 mm movie films like “Star Wars” and “Jaws”, and was most probably created by an optical printer.

I have never bothered to investigate the film gates in Super-8 cameras, but the all the Super-8 projectors which I have looked at use a rather narrow pulldown claw. So only the vertical film position is defined by the claw. The horizontal film position in all projectors I looked at is defined by an appropriately designed gate, usually by some spring mechanism pressing the edges of the film against a fixed stop. I took some guidance from these investigations in the design of my [3D printed Super-8 film gate](https://forums.kinograph.cc/t/v2-dev-milestone-3-lighting/1576/35). As designed, it does not always assure a perfect horizontal scan position. But horizontal movements with that gate happen only at cuts, occasionally, and those movements are barely noticable in the final scans.

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