Features
The Canon Speedlite 470EX-AI is the first flashgun ever to be equipped with what’s called AI bounce – a new Auto Intelligent (AI) function that’s been cleverly designed to work out the optimum position of the flash head before automatically maneuvering it to create the best possible lighting results in any given shooting environment.
In its full auto mode, the 470EX-AI first requires a test flash to be taken to calculate the ideal angle for natural, flattering illumination, which is achieved using the AI.B button at the rear of the Speedlight itself or from a customizable button on a compatible camera. After this, the motorised flash head moves into its optimal position, with a green light indicating that it’s all setup and ready to shoot.
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https://www.amateurphotographer.co.uk/reviews/accessories/canon-speedlite-470ex-ai-review-first-look
