Six Photos From the Same Position, Taken in Quick Succession

 Photo date: July 10, 2023. Photographer: Mark Mahin. 

We see below six consecutive non-flash photos I took in quick succession, from the same spot at the bottom of a stairway which has 14 steps.  We see a strange "stairway to the light" effect. The camera does not produce any such effect when I photograph in other places.