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Technical resources

Cameras, screens and light

Flicker, LED walls, colour temperature and presenter light on a filmed event, and the settings that keep cameras and screens getting along.

PDF, 1 page · 200 KB · Updated November 2026

Events are lit for the room and then filmed. That's why streams show banding across LED walls, faces darker than the slides behind them and two cameras that don't match. Most of it is settled by a few decisions made before rehearsal, and this sheet lists them.

What's on it

  • Shutter speeds that avoid flicker under UK mains lighting, including when the show runs at US frame rates.
  • LED walls on camera: refresh, genlock, brightness, moire and colour temperature.
  • Colour temperatures you will meet in a hotel ballroom, and why auto white balance is the enemy of matched cameras.
  • Presenter light and colour rendering, and when to stop shooting the projection screen.
  • Camera position and lens checks before you hire.

Pair it with the camera lens calculator and the LED wall calculator.

Watermarked preview of Cameras, screens and light cheat sheet

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PDF, 1 page · 200 KB · free

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