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Westcott FJ400 Strobe 2-Light Backpack Kit with FJ-X3 S Wireless Trigger for Sony

MFR# 4713SWEST
Out of Stock

Included Items:

2× FJ400 Strobe, 2× FJ400 AC/DC Lithium Polymer Battery, 2× J400 Glass Dome (Gen 1, 3-Tab), 2× FJ400 AC Power Adapter & Cord (US/CA Plug), 2× FJ400 55-Degree Magnetic Reflector (FJ400/Bowens/Godox Mount), 2× FJ400 Magnetic Gel Set (5.5" CTO, 1/2-CTO, Window Green, Diffusion, Gel Frame), 1× FJ-X3 S Wireless Flash Trigger for Sony Cameras, 1× FJ-X3 Lithium-ion Battery, 3× USB-C To USB-A Cable, 1× Rapid Box Switch Octa-S, 2× Rapid Box Switch Insert (FJ400, Bowens, Godox), 1× Lite Traveler Backpack


  • Includes (2) FJ400 Strobes with AC/DC Batteries, (1) FJ-X3 S Wireless Trigger, (2) Magnetic Gel Packs, (2) Rapid Box Switch Inserts & Lite Traveler Backpack
  • 400 Watt-second strobes with 480+ full-power flashes per charge
  • 2.4 GHz wireless trigger for many Sony cameras (see compatibility chart)
  • 0.05 to 0.9 second recycle time
  • Removable AC/DC lithium polymer battery
  • Color temperature stability of 5500K (±150K) across entire energy range
  • High-Speed Sync, TTL, and Freeze, Front and Rear Curtain Sync capable
  • Adjustable 9 F-stop energy range in 0.1 and 1.0 increments
  • Continuous Capture up to 20 frames per second (camera model dependent)
  • 16 groups and 32 wireless channels

Never Miss a Shot Again

The FJ400 is the first portable 400Ws AC/DC strobe with under a second recycle speed at full power that offers an impressive 480+ full-power flashes per charge. The lightweight FJ400 offers unrivaled performance with the most accurate color temperature throughout its entire 9-stop output range.

TTL, High Speed Sync, Freeze Sync, and More

With an intuitive menu system and LCD color display, the FJ400 features Manual and TTL Flash Modes, High Speed Sync (HSS) up to 1/8000s, Freeze Sync up to 1/19000s, Continuous Capture up to 20 fps, Mask Function, Delay Function, Automatic Memory Recall, Rear Curtain Sync, Canon RT flash compatibility, group and channel assignment, Group Exposure Compensation, and much more. This strobe is firmware upgradeable via the included USB-C cable.

Dedicated Sony Camera Compatibility

When paired with an FJ-X3 S Wireless Trigger, the FJ400 strobe provides unrivaled features including High-Speed Sync, TTL, and more. The wireless trigger is designed with a proprietary Sony hot shoe mount for Sony cameras. See the compatibility chart for more details.

Unrivaled Battery Performance

The removable lithium polymer battery provides both DC power for on-location freedom and AC trickle-charge performance when the state of charge is above 25%.

Consistent Color Temperature at Every Power Level

The FJ400 maintains a color temperature stability of 5500K (±150K) throughout its entire 9-stop output range, with flash increments of either 0.1 or 1.0 stops. It features a 20W 5600K LED modeling lamp with auto-adjust and independent output control.

Optimized for Light Modifiers

The extended flash tube provides optimal light output allowing for a wider, even spread for filling light modifiers. Equipped with a Bowens S-Type mounting system, the FJ400 is easy to pair with your favorite softbox. The FJ400 includes a Magnetic 5” Reflector, Magnetic CCT Gel Set (CTO, 1/2-CTO, Window Green, Diffusion, Gel Frame), and a Rapid Box Switch Bowens Insert that allows you to pair your strobe with any Rapid Box Switch light modifier. The built-in tilter bracket with a tension screw offers secure mounting and positioning of large umbrellas and modifiers.

Designed with Safety In Mind

The FJ400 strobe is equipped with onboard self-monitoring cooling fans and an automatic shutoff feature to ensure safe operation during use.

Store and Transport Your Strobe Kit with Ease

Equipped with a large, central storage compartment featuring removable dividers, the included backpack is ideal for traveling comfortably with your FJ400 kit. It features various zippered compartments for storing smaller accessories, a separate internal compartment with three padded sleeves for storing laptops and tablets, a convenient water bottle pouch, a tripod holder with retention straps and more.

FJ-X3 S Compatibility

The FJ-X3 S trigger is compatible with most Sony cameras that have a hot shoe mount for manual mode operation. The following cameras provide TTL and HSS compatibility using the latest firmware update. Additional camera models are likely compatible and will be added to this list as they are tested and confirmed.

TTL, HSS & MANUAL
a7
a7 III
a7R II
a7R III
a7R IV
a9
a9 II
a99 II
a6500
MANUAL ONLY
a7II
a1
a7S III
a7C

*Compatible camera with minor HSS, TTL, and/or performance limitations that can often be offset with adjustments within the camera and/or FJ Wireless equipment settings.

  • LENGTH: 20.0" / 50.8 cm
  • WIDTH: 13.0" / 33.0 cm
  • HEIGHT: 8.5" / 21.6 cm
  • WEIGHT: 12.5 lbs. / 5.7 kg
  • LAMP/TUBE USER CHANGEABLE: Yes
  • FIRMWARE UPGRADABLE: Yes
  • BATTERY MOUNT: DC 2.5mm
  • REMOVABLE BATTERY: Yes
  • CASE INCLUDED: Yes
FJ400 Strobe
Maximum Power 400 Ws
Energy Range 9 F-Stop (1.56 - 400 Ws)
Flash Duration (t0.1) Normal: 1/280 - 1/3000s
Freeze: 1/280 - 1/7000s
Flash Duration (t0.5) Normal: 1/800 - 1/8500s
Freeze: 1/800 - 1/19000s
Recycle Time 0.05 - 0.9s
Continuous Capture 20 FPS (Camera Model Dependent)
Color Temperature Stability Normal/TTL/HSS: 5500K +/-150K
Freeze: 5500K +/-500K (E.R. 5-9)
Mounting System Bowens S-Type
Flash Increments 0.1-Stop and 1-Stop
Flash Modes Manual, TTL
Mask Function Yes (Manual)
IGBT Yes
Flash Exposure Compensation +/-3
Modeling Lamp LED 20W 5600K +/-200K
Sync Functions HSS, Normal (Front & Rear Curtain), Freeze
Sync Speed 1/8000s (High-Speed)
Wireless Radio Frequency 2.4 GHz
Wireless Channels 32 (AU, 01-31)
Wireless Groups 16
Wireless Range 985' (300m)
Display LCD Color Display
Mount Built-in Tilter; 5/8” / 16mm Receptacle
Auto-Dump Yes
Cooling Self-Monitoring Cooling Fans
Voltage Stabilization Yes
Port Type USB-C for Firmware Updates (PC, Mac)
Auto-Power Off Yes
Audible Beep Yes
Delay Function Yes (Manual)
Auto Memory Recall Yes

FJ-X3 S Trigger
Compatible Devices FJ400, FJ200, FJ80, FJ80 II, FJ-XR
Compatible Cameras Sony
Radio Frequency 2.4GHz
Wireless Channels 32 (AU, 1-31)
Wireless Groups 6 Native, 10 App
Wireless Range 985' (300m)
Control Modes TTL (Auto), Manual
TTL EV Range +/-3
Sync Functions HSS (Up to 1/8000), Normal (Front & Rear Curtain), Freeze (with compatible devices)
Standard Flash Sync HSS, Normal (Front & Rear Curtain), Freeze (with compatible devices)
Ports USB-C (Firmware Updates); 2.5mm (Output only)
Mobile App Yes
Bluetooth Yes
Firmware Update PC, Mac
Battery Rechargeable Lithium-ion (3.8V, Removable)

FJ400 Battery
Flashes Per Charge 480+ at Full Power
Battery Type AC/DC Lithium Polymer
Capacity 65Wh, 4400mAh
Voltage 14.8V
Battery Indicator LED
Recharge Time 2.5 Hours
Battery Charge Cycles 300+
AC Power Requirement Battery Level ≥25%
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