The acrylic diffusion panel behind the fish tank is lit with two independent light sources, a normal reflector (P70) and an average-sized Softbox (about 60 x 100 cm).
The P70 (equipped with honeycomb grids) is the main light and shapes the transparent object. As the bottle is only partly below the water level, we have to "extend" the gradations created by the P70 otherwise we will get very wide and dark edges of the bottle which appears above the water level. The Softbox 60 x 100 is responsible for this extended gradation.
A Boxlite finally lights the reflective parts of the bottle (the lid) and also creates a decent catch light on the glass.
All lights are connected to the same Scoro S pack that is set to the shortest possible flash duration - at the power setting of this shot, a 1/5600 s was available. This exposure time is by far short enough to freeze the water splash. (At lower settings, t0.1 values as short as 1/10,000 s are possible with Scoro S.)
