Retra UWT

No more darkness.

Focus on quality of light

Retra Flash is the world's first underwater flashgun with a fully circular flash tube. Combined with a completely new reflector design it produces a high quality light output no other flashgun this size can offer. It's not all about guide numbers.
Made with 2x Retra Flash PRO

User interface made by photographers

We've spent hundreds of hours analysing photographers feedback from the field and tweaking our designs. The end result is a back panel you are immediately familiar with. Controls are large and tactile, for all types of hands or gloves. You will always get what you expected when using the control panel of the Retra Flash. 

Made with 1x Retra Flash PRO

Ready to download for free on Google Play and the App store.

Underwater flashgun for the 21st century

The new Retra Flash connects via bluetooth to your smartphone or tablet (patent pending technology). Check the status of your flashgun, set advanced features like HSS, Smart SL, Pilot Adjust and get firmware updates with the "Retra UWT" App. The new Retra Flash is a true system that is also built for the future. 

Made with 2x Original Retra Flash

Powerful central pilot light: ideal for snooting

Securely attached via bayonet mount there are many accessories available for the new Retra Flash. The most prominent is the LSD Ultimate. With a super powerful centrally positioned pilot light you will be able to find your light spot even in very bright conditions. The Retra Flash and LSD Ultimate are made for each other.

A testing regime worth noting

Over the course of development a combined total of more than 1,4 million test shots were made with prototype and pre-production units of the new Retra Flash. We were looking for failure in every condition and pushing the material to it's limits. The final result is a product that can withstand anything the photographer asks from it.Made with 2x Retra Flash PRO (prototype)

Double o-ring and leakage detection

The new Retra Flash is the world's only underwater flashgun with a built-in leakage detector (patent pending technology). In the unlikely event of a battery compartment flood you will be notified by the Retra Flash to check the battery compartment at your earliest convenience. Our goal is to reach a 0% statistic in damage resulting from battery compartment flooding. 

Design your light without boundaries

With the bayonet mount your Retra Flash can be transformed into a specialist lighting tool. Diffusers for blue water, green water and a special diffuser for sharks are available. For macro work there are several options to reduce the angle of the light beam. Secure mounting is the way.


Original Retra Flash

New Retra Flash Prime

New Retra Flash PRO

100 Ws
100 Ws
150 Ws
Light output and power: >>> see comparison <<<

Color temperature:

~5400 K

~4900 K

~4900 K

Pilot light power (angle):

300 lm (60º)

300 lm (20º)

500 lm (20º)

Recycle time until 80% power (1): ~2 s ~2 s ~3 s
Recycle time until 40% power (1):
~1 s
~1 s
~1,5 s
No. flash at full power (1):
No. flash at half power (1):
400+ 400+ 300+
Recycle time until 80% power (2):
~1 s
~1,5 s
Recycle time until 40% power (2):
~0,5 s
~0,7 s
No. flash at full power (2):
No. flash at half power (2):
Multi-level battery indicator:

HSS ready:




Power levels: 9 13 13

Bayonet mount type:




Electrical connector: Built-in via Converter via Converter
Optical connector (6): YES YES YES
Diameter x length (mm) 102,5 x 130 102,5 x 130 102,5 x 130
Weight (3): 845 g 870 g 910 g

Weight in water (3): 

~130 g
~130 g 

Weight with Supercharger (4):

1.110 g
1.150 g

Weight in water with Supercharger (4):

~280 g 
~320 g 
Depth rating: -100 m
-100 m
-100 m
Bluetooth connectivity (5): / YES YES
Leakage detector (5) / YES YES

User manuals are available from our App called "Retra UWT", ready to download for free on Google Play and the App store.

Watch a hands-on video with the new Retra Flash: