The controller is responsible for releasing the drop from solenoid valve, and trigger the flash on the correct moment for taking the photo. The camera just waits with its shutter open on the right moment.
The Camera Axe logo is the one refracted on the droplet, No Photoshop other than the B&W conversion.
If you are seriously planning to play with high-speed-photography, this is the controller you need.
This photo can be also seen with a black background, just click on the photo!.
Hope you like it. you are invited to vote for this photo, or add to your favorites if you like it..
... and don't hesitate to follow my work on 500px !
Disclaimer: I have no connection to Camera Axe Shop, I'm just a happy user of it.