Retra Flash Pro Max II Underwater Strobe

The Retra Flash Pro Max II is Retra's fifth-generation professional underwater strobe, engineered to push the boundaries of lighting performance.

Delivering 65% more light output, 25% faster recycle times, and a 120% brighter pilot LED, it sets a new standard for power and reliability—all within the same compact form factor as the previous Pro Max generation.

The Retra Flash Pro Max II is Retra's most advanced professional strobe yet, engineered for photographers who demand the highest performance, reliability, and flexibility on every dive.

Compact. Bright. Built for Professionals.

Delivering 190Ws of flash power, the Retra Flash Pro Max II achieves a 65% increase in actual light output over the previous generation—all without adding size or weight.

This performance boost comes from a fully redesigned reflector, enhanced electronics, and an improved triggering system that channels more energy into light and less into heat.

The pilot light has been upgraded to deliver 120% more brightness, providing enhanced visibility and pinpoint precision when using the LSD snoot.

Fast. Reliable. Efficient.

25% faster recycle times bring Li-ion performance while using widely available and travel-safe NiMh batteries. No compromises. Just faster shooting and consistent power delivery in even the most demanding situations.

Enjoy up to 2000 shots at 25% power with the 8xAA configuration, giving you unmatched autonomy during extended sessions.

Built for Harsh Environments

Durable gold-plated contacts provide enhanced corrosion resistance and reliable electrical performance, even in the most demanding underwater conditions. Designed for longevity, they ensure consistent connectivity in both the strobe and battery caps, giving you the confidence to dive after dive.

Instant Readiness and Precision Control

The Retra Flash Pro Max II powers up instantly with no wait time in BATT/TEST mode, so you're always ready to shoot. With 17 selectable power levels, you have precise control at your fingertips, allowing you to fine-tune output for any lighting scenario.

Classic Bayonet Mount

The bayonet mount is an easy to use twist lock mechanism at the front of the strobe. The bayonet mount allows you to attach a selection of accessories that shape your light or change its color temperature.

The bayonet mount remains the same on all Retra Flash models and allows you to change photography styles on the go.

• Locking mechanism for safely attaching accessories
• Compatible with all existing Retra Flash front-mounted accessories

Leakage Detection & Prevention

The Retra Flash has built-in leakage detection that warns you if water ever enters the battery compartment. But you can rest easy, knowing the battery compartment is sealed from the rest of the electronics.

• Built-in leakage detection
• Double O-ring protection
• Battery compartment is waterproof and sealed from electronics
• Circuit protection

Smartphone Connectivity

The Retra Flash Pro Max can connect to your smartphone via Bluetooth with the Retra UWT app.

Retra UWT App allows you to:

• Download firmware updates
• Choose custom user modes
• See basic information (number of flashes, current version, serial number, etc.)
• Read instruction manuals
• You can download the Retra UWT app for free on Google Play and the App Store.

Description of modes

BATT/TEST

The BATT/TEST mode allows you to check the battery status of your strobe. Test your strobe's flash output or use it for creative lighting techniques with long exposure.

M

Retra Flash Pro Max II emits a single pulse of soft light at the selected power level. You can fine-tune the strength of illumination with 13 power levels of ~0.5 F-Stop increments, giving you a total of ~7 F-Stops, without accessories.

TTL

Retra Flash Pro Max II uses your camera's calculations to determine the ideal exposure for the scene by using a pre-flash. You can adjust the relative power of the automatic exposure if you feel it was too high or low.

HSS

Retra Flash Pro Max II is capable of emitting a long flash pulse, required for HSS photography. You can fine-tune the strength of exposure to suit your specific needs.

U1, U2

The U1 and U2 modes allow you to tailor your Retra Flash experience. Select your custom user mode by connecting your strobe with the Retra UWT App. You can choose between Smart SL, Manual Low Power, or LED Adjust modes.

TURN/SOS

You can rotate the display 180°, making it easy to read and control the Retra Flash Pro Max II no matter how it's mounted or positioned underwater.

And if you ever find yourself in an emergency, the strobe can emit an SOS signal in Morse code, overriding any active errors to ensure your distress signal is seen.

PILOT LIGHT

Retra Flash Pro Max II features a 1,000 lumen pilot or guide light with two intensity levels, allowing you to find the ideal position for your strobes quickly and easily. You can also customize the intensity of each level with the LED Adjust mode in the Retra UWT App.

Pilot light feature is available in M, TTL, HSS, and U modes.

What's in the box:

• 1x Retra Flash Pro Max II
• 1x Booster with real gold-plated contacts
• 1x Regular battery cap with real gold-plated contacts
• 2x USB Charger
• 1x 1"(inch) Mounting ball
• 1x Allen key
• 2x Spare O-rings for the battery compartment
• 1x Silicone grease
• 3-year Retra Warranty

Technical Specification

• Model: Retra Flash Pro Max II
• Energy: 190 Ws
• Power Source (1): AA Batteries
• Housing: Monolithic Aluminium Alloy
• Weight (2): 888g / 1.005g // 1,96 lbs / 2,21 lbs
• Dimensions (mm) / (height w/ Booster): Ø 102,5 mm x 148 / 173 mm / Ø 4.0 inch x 5.8 / 6.8 inch
• Color Temperature: ~4900 K
• Recycle time (3): 0-1.9 s
• Leakage Detection: Yes
• Back Panel Display: Yes
• TTL: Yes
• HSS: Yes
• Bluetooth connectivity: Yes
• Bayonet Mount: Classic A1
• Optical Connector: Inon threaded connector / Sea&Sea plug connector
• Flash at half power w/ Booster: 1000+
• Flash at full power w/ Booster: 300+
• Buoyancy w/ Booster: -160 g / -5.6oz
• Buoyancy wo/ Booster: -70 g / -2.5oz
• (1) 4x AA rechargeable batteries or 8x AA rechargeable batteries when using Booster
• (2) Weight on land including 1" (inch) mounting ball and 4x AA Eneloop PRO Batteries / 8x AA Eneloop PRO Batteries respectively
• (3) With 8xAA Enloop PRO. Recycle time varies depending on the chosen power setting.