Submitted feedback FB11545441.

I'm seeing the same issue. The field of view reported on my iPhone 15 Pro (non max) is 41.2. This is throwing off my app's calculations when it provides a framing guide (as suggested in the WWDC 2021 talk "What's new in Camera Capture" https://developer.apple.com/videos/play/wwdc2021/10047/). Based on a little trigonometry, the error we're seeing here is consistent with what you'd expect if the sensor was twice the size in both dimensions. So I think the bug does have something to do with the pixel doubling in the 48 megapixel sensor. I hope Apple can release a fix for this soon. For now I've added a workaround that subtitles a hard coded value for videoFieldOfView when running on an iPhone 14 Pro model.