On: Photographer captures ultra-rare red ring of light...

[bnegreve]

I don't understand how does he knows where to point the camera at, before the event occurs?

[viraptor → bnegreve]

The photographer was following the storms and taking videos while pointing at one.

[bnegreve → viraptor]

Still, it is a rare event and he had a camera without the IR filter set up to capture this particular phenomenon. So, either a lot of luck or a lot of dedication.