1. Introduzione
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. Caratteristiche principali
- 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.
- Modalità versatili: 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. Impostazione
- Caricare la batteria: 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.
- Installa la batteria: Slide the charged battery pack into the designated slot on the FJ400 strobe until it clicks securely into place.
- Collega riflettore/modificatore: Secure the included 5.5" Magnetic Reflector or any Bowens S-Type mount modifier to the front of the strobe.
- Mount the Strobe: Attach the FJ400 strobe to a light stand using the built-in tilter bracket. Ensure it is securely tightened.
- Accensione: 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. Modalità operative
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. Modalità TTL
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. Modalità di congelamento
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.
Video 1: Un overview of the various flash modes available on the Westcott FJ400 Strobe, including Normal (Manual), TTL, HSS, and Freeze modes, demonstrated by a Westcott representative.
5. Batteria e alimentazione
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.
- Sistema senza fili: Compatible with the Westcott FJ-X2m Universal Wireless Trigger or Westcott FJ80 Speedlight for 2.4G wireless control across 6 groups and 16 channels.
- Compatibilità fotocamera: 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.
Video 2: Un overview of the Westcott FJ Wireless System, detailing the flashes and triggers, and their multi-brand compatibility.
7. Manutenzione
- Pulizia: 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.
- Magazzinaggio: 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.
- Aggiornamenti del firmware: 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. Risoluzione Dei Problemi
If you encounter any issues with your Westcott FJ400 Strobe, please refer to the following general troubleshooting steps:
- Problemi di alimentazione: Ensure the battery is fully charged and properly installed. If using AC power, verify the power adapter is correctly connected to a working outlet.
- Il flash non si attiva: 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).
- Esposizione incoerente: 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.
- Surriscaldamento: 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 websito o contattare il loro servizio clienti.
9. Specifiche
| Caratteristica | Dettaglio |
|---|---|
| Dimensioni del prodotto | 12.95 x 11.55 x 7.15 pollici |
| Peso dell'articolo | 5.28 libbre |
| Numero modello articolo | 4700 |
| Batterie | 1 batteria ai polimeri di litio richiesta |
| Durata della batteria | 2.5 Hours (approximate usage time, not flash count) |
| Flash della fotocamera | Incorporato |
| Velocità di sincronizzazione del flash | 1/8000 (HSS) |
| Produttore | F.J. Westcott |
| Supporti compatibili | Canon, Sony, Nikon, Fuji, Olympus, Panasonic Lumix |
10. Cosa c'è nella scatola
The Westcott FJ400 400Ws Strobe package includes:
- Westcott FJ400 400Ws Strobe
- AC/DC Lithium Polymer Battery
- Cupola di diffusione
- 5.5" Magnetic Reflector
- Magnetic CCT Gel Set
- Cavo USB
- Rapid Box Switch Insert
- Custodia da viaggio
Video 3: Una panoramica completaview of the Westcott FJ400 Strobe and its included kit components.
11. Garanzia e supporto
The Westcott FJ400 Strobe is backed by a manufacturer's warranty. For specific warranty details, registration, and technical support, please visit the official Westcott webo contattare il servizio clienti. Conservare la prova d'acquisto per eventuali reclami in garanzia.





