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Canon R7 Dual Pixel CMOS: How does it work?

Started 4 months ago | Discussions thread
OP freixas Junior Member • Posts: 29
Re: Canon R7 Dual Pixel CMOS: How does it work?
1

JohnMoyer wrote:

Think of an edge with one side light and one side dark. Parallax causes the two halves of the pixel to differ. The two halves of a dual pixel each get a different light value if pointed at the edge. The magnitude of the difference tells how far to move the focus and the sign of the difference tells which direction to move the focus. Maybe the object with the edge needs to be wide enough so that there is still contrast surrounding the edge.

This is true only if I understand it correctly. You might understand it better than me.

I'm never quite sure what you're replying to. You don't include a quote and the threaded view seems to show you are responding to one of your own posts.

Did you see my lengthy response labeled "UPDATE: Latest guesses"? The point there is that parallax is how dual-pixels are usually explained. This would result in double-exposure-like images for anything not in focus,

The method that makes sense (and I was clued in by one of the articles you cited) is the angle of incidence of the light. This avoids parallax issues but still allows phase detection. Hopefully, my detailed diagrams will make it all clear.

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