Fotocore GT-Pro Underwater strobe

Fotocore GT-Pro Underwater Flash without TTL (black)

The Fotocore GTPro underwater flash is designed for photographers who take wide-angle shots at high speed and don't want lighting to be a limiting factor. With fast recharge times, high continuous power, and a circular flash tube optimized for wide coverage, the GT-Pro flash is designed to keep up with action-packed dives where timing and consistency are more important than automation.

In practical use, this flash is ideal for photographers shooting fast sequences, such as schools of fish, fast-moving subjects, or coral reef scenes, as it maintains its performance at a synchronization rate of up to 10 frames per second.

Please note: The GT-Pro flash is a fully manual flash with no S-TTL or TTL support.

For photographers who are already familiar with manual flash control, it is a powerful and predictable tool. For those who expect camera-controlled exposure, it is not the right choice, even though it is one of the best underwater flashes in its class.

• Ideal for: Wide-angle photographers who shoot fast action, continuous shooting, or continuous images.
• Not suitable for: Photographers who expect camera-controlled S-TTL or TTL exposure: this flash is exclusively manual.
• Extremely short recharge times (0.1–1 s) enable continuous shooting at up to 10 frames per second.
• 160 Ws power with round flash tube for more even wide-angle coverage.

Direct and tactile control underwater

The GTPro's physical controls are arranged so that they can be operated even with thick dry gloves, reducing dependence on buttons or tiny screens. This is important when quick power changes need to be made between shots.

• The controls are easy to identify by touch.
• There is no need to navigate through menus during the dive.
• Supports conscious manual exposure sequences.

Designed for consistent light output

In practice, photographers choose the GTPro for its reproducible lighting behavior rather than its technical specifications. This consistency makes it easier to balance dual flash configurations.

• Predictable performance from shot to shot.
• Easier pairing when using two flash units.
• Suitable for wide-angle or macro photography.

Fits standard arm systems

The GTPro fits the typical ball joint arm configurations used in many underwater housings, making it easy to add to or remove from existing equipment.

• Compatible with common arm configurations.
• Works well in configurations with one or two flash units.

Perfect for...

• Wide-angle shots of coral reefs and shipwrecks.
• Macro photographers who prefer manual flash control.
• Photographers who want to upgrade from an entry-level flash unit to a higher-end model.
• Travel gear where consistency is more important than automation.

Technical Specifications

• Model: GT-Pro
• Modes: 9 modes
• Guide number: 24
• Flash tube: Circular flash tube
• Power: 160 Ws
• Connection: Optical cable / 6-pin
• Illumination: 160°–110° (reducing ring)
• Battery: FOTOCORE battery (4 lithium batteries 18650)
• Battery capacity: 25.2 Wh
• Flash capacity: 650 flashes at full power, 6000 flashes in first mode
• Charging time: 0.1 s–1 s
• Flash speed: unlimited flash synchronization with 10 flashes/second from first to third mode
• Power indicator: LCD display
• Color temperature: 5000 K
• Waterproof depth: 100 m
• Focus/target lighting: 30 W / 3000 lumens (central focus) – 3 modes
• Dimensions: 142 × 92 mm
• Weight (on the ground): 1210 g without battery
• Scope of delivery: Flash, battery, reduction ring, charger, operating instructions
• TTL: Does not support S-TTL and TTL
• Note: All parameters are based on the FOTOCORE test standard.
• Weight: 2.70 pounds
• Dimensions: 6.00 (inches) × 4.00 (inches) × 6.00 (inches)