Sea Frogs Flash ST-100 PRO 100m GN 32 – Power, precision and versatility in your underwater photography dives
The Sea Frogs ST-100 PRO is a professional underwater flash designed to deliver maximum power, coverage and exposure control. With a guide number (GN) of 32 and an illumination angle of 100°x100°, it guarantees wide, uniform and precise light, ideal for macro, wide-angle and marine life photography in any underwater environment.
Its compact and lightweight design makes handling easy both underwater and above, without compromising performance or durability.
Powerful illumination and precise control
The ST-100 PRO integrates an 800 lm focus light that automatically turns off when the shutter is released, optimizing exposure and battery life.
It offers automatic S-TTL modes with precise exposure control and 11 manual power levels adjustable in ½ EV steps, allowing the photographer to adapt the light intensity to each scene with total flexibility.
Compatible with optical or USB connection, the system supports TTL synchronization (especially with Nikon cameras), offering balanced and color-accurate exposure, with a color temperature of 5600 K.
Robust construction and professional functionality
Built to withstand pressures up to 100 m depth, the flash includes 5-pin connectors, LED status indicator, and flexible power options via alkaline AA batteries or rechargeable Ni-MH.
Its performance guarantees up to 500 flashes with alkaline batteries or 600 with Ni-MH, with a fast recycle time of just 4–5 seconds.
Key features
- Guide number: GN 32 (ISO 100).
- Light coverage: 100° x 100°.
- Focus light: 3 W / 800 lm LED (auto off after 8 s or firing).
- Color temperature: 5600 K.
- Modes: S-TTL automatic / Manual (11 adjustment steps).
- TTL Compensation: ± 2 EV in 0.3 EV increments.
- Connectivity: optical cable or USB (TTL Nikon compatible).
- Connectors: 5 pins + optical fiber.
- Power Source: 4 × AA (1.5 V Alkaline / 1.2 V Ni-MH).
- Battery Life: 500 – 600 flashes.
- Recycling Time: 4 – 5 seconds.
- Maximum Depth: 100 m / 328 ft.
- Dimensions: 105 × 163 × 90 mm.
- Weight: light and balanced for arm or grip use.
- Color: black.
Package contents
- 1 × Flash ST-100 PRO.
- 3 × Soft light diffuser filters.
- 1 × Fiber optic cable.
- 1 × Spare O-ring.
- 1 × Cleaning cloth.
- 1 × User manual.
Advantages
- Powerful illumination with ultra-wide coverage.
- Precise control with 11 manual levels and automatic S-TTL.
- Focus light synchronized with the shot.
- Compatible with most cameras via optical cable or USB.
- High resistance and reliability up to 100 m.
🔧 Important note
Rinse with fresh water after each use and dry completely before opening the battery compartment. Check the condition of the O-ring and apply silicone grease periodically.
Find the Sea Frogs Flash ST-100 PRO 100m GN 32 at the best price in our physical store BOX-FISH in Tenerife or with fast shipping to all the Canary Islands.
BOX-FISH is an Official Sea Frogs Distributor in the Canary Islands.
| Brand | Sea Frogs |
| Color | Red, Black |