The PZ 400 is NISSIN's largest most powerful hot shoe mounted flash. Having a maximum guide number of 138 (in feet with 100 ISO film) this dedicated f

The PZ 400 is NISSIN's largest most powerful hot shoe mounted flash. Having a maximum guide number of 138 (in feet with 100 ISO film) this dedicated flash unit communicates with the camera's built-in light meter, called TTL (Through The Lens) metering and incorporates NISSIN IGBT (Isolated Gated Bipolar Transistor) circuitry for perfect program flash operation.