rfnixThat is a *fantastic* homemade visualization of how phase-detection #autofocus works!
https://blog.reikanfocal.com/2023/05/how-it-works-on-sensor-phase-detect-autofocus/
Note in passing that this is exactly how you get me to share semi-promotional articles — the end goal of this is clearly to sell their software. *However* this is also an amazing quality article that precisely explains the tech behind PDAF with painstakingly-made illustrations that I haven't seen anywhere else — the author mentions making them with good old povray[0]. Miles ahead of any other commercial articles I've seen recently.