0xD826 (vendor extension property)
Acquires and sets the ISO sensitivity upper limit when ISO sensitivity is set to automatic.
UINT16
100 (Theta X only), 125 (Theta X only), 160 (Theta X only), 200, 250, 320, 400, 500, 640, 800, 1000, 1250, 1600, 2000, 2500, 3200, 4000 (Theta Z1 only), 5000 (Theta Z1 only), 6400 (Theta Z1 only)