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Canon tried to use eye tracking cameras. Eg “look in the viewfinder where you want to focus”. It didn’t take initially (90s). But it’s back . https://m.dpr

• ghaff 4y ago
  Interesting. I'll have to ask my friend who covers Canon to some degree about this. Yeah, they dropped it after trying it out in one of two film camera models in the 90s. They were always a bit cagey about why although, in my experience, it didn't work all that well.
  • CarVac 4y ago
    In the R3 it's used only briefly to select an initial autofocus point, after which it hands over control to the subject-tracking algorithms. From what I've read, for some it can be startlingly effective but outright refuses to work on other people's eyes.