The FOTOCORE F4 is a compact focus and creative light designed for macro and close-focus wide-angle underwater photography. Delivering up to 5,600 lumens from a 3×18650 battery pack, it runs 9 modes including white, red, blue, and optional UV via dual buttons with stepless dimming — giving you both creative colour control and practical focusing capability in one lightweight package. The 120° beam angle is broad enough to double as a video fill light when needed. Weighing just 460g, the F4 won’t throw off your rig balance.

The standout feature is its strobe mode, which can be synced via fibre cable — making the F4 a perfect companion light for compact cameras that can’t accept a full-size strobe. CRI of Ra96 at 5600K ensures colours pop on camera just as they look through the viewfinder. Rated to 100m with a 137×46×56mm body that fits easily on short arms. Available in Black and Blue.

Specifications

• Model: F4
• SKU: F4 Black
• Output: Up to 5,600 lumens
• Modes: 9 (dual button, stepless dimming)
• Light Modes: White, Red, Blue (+ optional UV)
• Strobe Mode: Yes (fibre cable sync)
• Battery: 3×18650 pack
• Beam Angle: 120°
• Color Temperature: 5600K
• CRI: Ra96
• Waterproof Depth: 100m
• Dimensions: 137×46×56mm
• Weight: 460g
• Colors: Black / Blue