Regarding the weird effect at f/1.2 and 1/4000sec - thinking about it - it may not have been the shutter but a flickering effect from the (LED-)lights.
BTW, multiple "Cat's eye" as shown are surely "cat eyes" ;-)
BTW, multiple "Cat's eye" as shown are surely "cat eyes" ;-)
Chief Editor - opticallimits.com
Doing all things Canon, MFT, Sony and Fuji
Doing all things Canon, MFT, Sony and Fuji