Best Friend's Daughter Portrait

From photoshoot in "my Central Park studio" (under overpass bridge) with my best friend's daughter.
Using inverse square law to make background black and using daylight coming from outside as a fill light. Main light strobe with 24"octa softbox on camera right. Second strobe camera left slightly behind subject.
Shot with my favorite for Canon crop sensor lens old Sigma 50-150mm f/2.8 OS.