Westcott FJ400 Strobe 400Ws with AC/DC Battery Instruction Manual

1. Introduction

The Westcott FJ400 Strobe is a powerful and versatile 400Ws flash unit designed for professional photographers. It features an AC/DC battery for portable use, offering TTL, HSS, and Freeze Sync modes. This manual provides essential information for setting up, operating, and maintaining your FJ400 Strobe to ensure optimal performance and longevity.

Figure 1: The Westcott FJ400 Strobe with its standard reflector.

2. Key Features

• Revolutionary Accuracy & Compatibility: 400Ws flash with AC/DC battery, 0.05-0.9 second recycle time, and over 480 full-power flashes per charge. Features 2.4G wireless communication with optional Westcott FJ-X2m Universal Wireless Trigger or Westcott FJ80 Speedlight.
• Versatile Modes: Includes Manual & TTL Modes, High-Speed Sync (HSS) up to 1/8000s, Freeze Sync up to 1/19000s, Continuous Capture up to 20fps, Mask Function, Auto Memory Recall, Rear Curtain Sync, 6 Groups, and 16 Wireless Channels with Group Exposure Compensation.
• Unrivaled Performance & Stability: Removable AC/DC 14.8V 4400mAh 65Wh LiPo battery pack for on-location freedom and trickle-charge when connected to AC power. Maintains a stable color temperature of 5500K±150K across its entire 9 F-stop energy range.
• Optimized Design & Intuitive Features: Equipped with a 20W LED 5600K modeling lamp, an extended flash tube for even light spread, an intuitive menu system, and an LCD color display. Includes onboard self-monitoring safety features and supports USB firmware upgrades.
• Mounting & Accessories: Features a lightweight housing with a built-in tilter bracket and umbrella mount, along with a Bowens S-Type mount. Includes a Diffusion Dome, 5.5" Magnetic Reflector, Magnetic CCT Gel Set, USB Cable, Rapid Box Switch Insert, and a Travel Case.

3. Setup

1. Charge the Battery: Before first use, fully charge the removable 14.8V 4400mAh 65Wh LiPo battery using the provided AC/DC charger. The battery can also trickle-charge while the strobe is connected to AC power during operation.
2. Install Battery: Slide the charged battery pack into the designated slot on the FJ400 strobe until it clicks securely into place.
3. Attach Reflector/Modifier: Secure the included 5.5" Magnetic Reflector or any Bowens S-Type mount modifier to the front of the strobe.
4. Mount the Strobe: Attach the FJ400 strobe to a light stand using the built-in tilter bracket. Ensure it is securely tightened.
5. Power On: Press and hold the power button to turn on the strobe. The LCD display will illuminate.

Figure 2: The Westcott FJ400 Strobe comes with a durable carrying case for transport.

4. Operating Modes

The FJ400 Strobe offers several operating modes to suit various photographic needs. You can switch between modes using the 'MODE' button on the control panel.

4.1. Normal Mode (Manual)

In Normal Mode, the flash output is manually controlled. This mode is indicated by 'NOR' on the LCD display. You can adjust the power in 1/10th stop increments or full stops for precise lighting control.

4.2. TTL Mode

TTL (Through-The-Lens) Mode provides automatic flash exposure. The strobe and camera work together to determine the optimal flash output for the scene. You can apply exposure compensation in TTL mode to fine-tune the brightness.

4.3. HSS Mode (High-Speed Sync)

HSS Mode allows the strobe to synchronize with shutter speeds faster than the camera's native sync speed (up to 1/8000s). This is ideal for shooting outdoors in bright conditions with a shallow depth of field. HSS requires the use of a compatible Westcott FJ-X2m Universal Wireless Trigger.

4.4. Freeze Mode

Freeze Mode shortens the flash duration to capture fast-moving subjects with extreme clarity, effectively freezing motion. This mode is useful for action shots, water splashes, or confetti. Freeze Sync can achieve speeds up to 1/19000s.

Figure 3: The intuitive LCD color display of the FJ400 Strobe for easy setting adjustments.

5. Battery and Power

The FJ400 Strobe is powered by a removable AC/DC 14.8V 4400mAh 65Wh Lithium Polymer (LiPo) battery. This battery provides over 480 full-power flashes on a single charge and offers a fast recycle time of 0.05-0.9 seconds. The strobe can operate while connected to AC power, which also trickle-charges the battery simultaneously.

6. Accessories and Compatibility

The FJ400 Strobe is designed for broad compatibility and comes with several useful accessories:

• Bowens S-Type Mount: Allows for a wide range of light modifiers to be attached.
• Included Modifiers: Diffusion Dome, 5.5" Magnetic Reflector, and Magnetic CCT Gel Set for light shaping.
• Wireless System: Compatible with the Westcott FJ-X2m Universal Wireless Trigger or Westcott FJ80 Speedlight for 2.4G wireless control across 6 groups and 16 channels.
• Camera Compatibility: The FJ Wireless System is compatible with Canon, Sony, Nikon, Fuji, Olympus, and Panasonic Lumix cameras.

Figure 4: The Westcott FJ-X2m Universal Wireless Trigger and FJ80 Speedlight, compatible with the FJ400 Strobe.

7. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the strobe. For the flash tube and modeling lamp, use a lint-free cloth and a small amount of isopropyl alcohol if necessary. Ensure the unit is powered off and disconnected from power before cleaning.
• Storage: Store the FJ400 Strobe in its provided travel case in a cool, dry place when not in use. Remove the battery if storing for extended periods.
• Firmware Updates: Periodically check the Westcott website for firmware updates to ensure your strobe has the latest features and performance enhancements. Follow the instructions provided with the firmware update carefully.

8. Troubleshooting

If you encounter any issues with your Westcott FJ400 Strobe, please refer to the following general troubleshooting steps:

• Power Issues: Ensure the battery is fully charged and properly installed. If using AC power, verify the power adapter is correctly connected to a working outlet.
• Flash Not Firing: Check the wireless trigger connection and ensure the strobe and trigger are on the same channel and group. Verify the camera's flash settings and shutter speed are compatible with the selected strobe mode (e.g., HSS for high shutter speeds).
• Inconsistent Exposure: In TTL mode, try adjusting exposure compensation. In Manual mode, verify power settings and camera exposure settings (aperture, ISO). Ensure no obstructions are blocking the light path.
• Overheating: The strobe has self-monitoring safety features. If it overheats, it may temporarily cease firing. Allow it to cool down before resuming use.

For more detailed troubleshooting or technical support, please visit the official Westcott support website or contact their customer service.

9. Specifications

10. What's in the Box

The Westcott FJ400 400Ws Strobe package includes:

• Westcott FJ400 400Ws Strobe
• AC/DC Lithium Polymer Battery
• Diffusion Dome
• 5.5" Magnetic Reflector
• Magnetic CCT Gel Set
• USB Cable
• Rapid Box Switch Insert
• Travel Case

11. Warranty and Support

The Westcott FJ400 Strobe is backed by a manufacturer's warranty. For specific warranty details, registration, and technical support, please visit the official Westcott website or contact their customer service department. Keep your proof of purchase for warranty claims.