EXIF Runtime Since Startup

Looking at EXIF #metadata for a project and noticed that the iPhone records "Run Time Since Power Up" in each photo it takes. Innocent enough, I guess... maybe added when they were debugging something?

Here's a plot for about 15,000 photos from my library. It looks like I once went 54 days without rebooting! That must have been before the pace of iOS updates increased.

Also in #TIL #EXIF #metadata tags, the awesomely named “Circle Of Confusion” https://en.wikipedia.org/wiki/Circle_of_confusion
“Real lenses do not focus all rays perfectly, so that even at best focus, a point is imaged as a spot rather than a point. The smallest such spot that a lens can produce is often referred to as the circle of least confusion.”