The Einstein™ 640 is a precision-driven studio flash built to give photographers complete control over both motion and color. Its Action Mode delivers exceptionally short flash durations—down to 1/13,500 second at minimum power—to freeze fast-moving subjects with remarkable clarity, while Color Mode prioritizes consistency, maintaining a stable 5600K ±50K color temperature across its entire power range. Whether you’re capturing high-speed action or demanding perfectly consistent color from frame to frame, Einstein gives you the flexibility to choose the performance that matters most for the shot.
This flash unit retails for $530, the reflector retails for $39, it can all be yours for $265, I have 5 of these units.