FJ400 - Lamp Westcott - Free user manual and instructions
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| Product Type | Studio Strobe / Flash Unit |
| Model | FJ400 |
| Brand | Westcott |
| Power Output | 400Ws (adjustable in 1/10-stop increments) |
| Recycle Time | 0.05–1.0 seconds (fast recycle mode) |
| Modeling Lamp | 50W LED (variable brightness) |
| Color Temperature | 5600K ± 100K |
| Flash Duration | 1/8000 – 1/800 second (t0.5) |
| Power Source | AC adapter (100-240V) or dual V-mount battery (not included) |
| Wireless Control | 2.4GHz radio (up to 100m), compatible with FJ trigger system |
| Sync Options | Wireless, sync port (3.5mm), optical slave |
| Dimensions (with head) | Approx. 23 x 14 x 14 cm (9 x 5.5 x 5.5 in) |
| Weight (head only) | Approx. 2.2 kg (4.85 lbs) |
| Fan Cooling | Active cooling fan (variable speed) |
| Mount Type | Bowens mount (compatible with most modifiers) |
| Display | Backlit LCD screen with touch-sensitive controls |
| Care & Maintenance | Keep vents clean; avoid moisture; store in padded case. |
| Safety | Overheat protection; auto-dump when turning off; secure battery latch. |
| Spare Parts & Repairability | Modular design; flash tube and modeling lamp user-replaceable; service center available. |
| General Information | Silent mode for video; firmware upgradable via USB-C. |
Frequently Asked Questions - FJ400 Westcott
What is the power output of the Westcott FJ400?
The FJ400 provides 400Ws of power, adjustable in 1/10-stop increments from full to minimum.
Can the FJ400 be used with batteries?
Yes, it accepts dual V-mount batteries (not included) for portable use, or an AC adapter.
Does the FJ400 have a modeling lamp?
Yes, it features a 50W variable LED modeling lamp that accurately represents the flash output.
What wireless system does the FJ400 use?
It uses a 2.4GHz radio system compatible with Westcott FJ triggers, with up to 100m range and 8 groups.
How fast is the recycle time?
At full power, recycle takes about 1.0 seconds; at minimum power, it recycles in 0.05 seconds.
Is the FJ400 compatible with Bowens-mount modifiers?
Yes, it has a Bowens mount, so it works with most softboxes, reflectors, and other modifiers.
Can I use the FJ400 with other trigger brands?
It features a sync port (3.5mm) and optical slave mode for compatibility with non-Wescott systems, but wireless only works with FJ triggers.
How do I update the firmware?
Connect the FJ400 to a computer via USB-C and use the Westcott firmware updater tool.
Is the FJ400 quiet for video use?
It has a silent mode that disables the fan and screen while maintaining full performance, ideal for video.
What is the flash duration range?
Flash duration (t0.5) ranges from 1/8000 second at low power to 1/800 second at full power.
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USER MANUAL FJ400 Westcott
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Product information
Brand : Westcott
Model : FJ400
Category : Lamp