








Retra Flash Prime X
Over the past decade, underwater photographers and engineers have teamed up with a single goal in mind: develop a true lighting tool for underwater photography. The Retra Flash Pro X and Prime X were rigorously tested and optimised with feedback from engineers and professional photographers. The final design of the Pro X and Prime X strobes reflects the experience and knowledge we accumulated during countless hours of laboratory and field testing.
The end result is an elegant compact casing with a powerful light output that is optimised for the best all-around performance, delivering outstanding images with every press of the shutter button.
Availability
The Retra Flash Prime X is currently not in stock. Please contact us for more details at: help@retra-uwt.com
Technical Specification
Diameter & length |
102,5 mm x 130 mm |
Weight (3) |
825 g |
Weight in water (3) |
~90 g |
Weight with Supercharger (4) |
1.030 g |
Weight in water with Supercharger (4) |
~200 g |
Depth rating |
- 100 m |
Energy |
100 Ws |
Color Temperature |
~ 4.900 K |
Pilot Light Power (5) |
300 lm |
Pilot Light Angle |
20º |
Pilot Light burn time at full power (1) |
~ 2,5 h |
Pilot light burn time at full power (2) |
~ 4 h |
Recycle time to 80% power (1) |
~ 1,5 s |
Recycle time to 80% power (2) |
~ 0,8 s |
Recycle time to 40% power (1) |
~ 0,8 s |
Recycle time to 40% power (2) |
~ 0,4 s |
No. flash at full power (1) |
235+ |
No. flash at full power (2) |
480+ |
No. flash at half power (1) |
465+ |
No. flash at half power (2) |
1050+ |
Multi-level battery indicator |
YES |
HSS ready |
YES |
TTL version |
3 |
Bayonet mount type |
A1 |
Electrical connector |
via converter |
Optical connector |
YES |
Bluetooth connectivity |
YES |
Leakage detector |
YES |
- (1) with 4x AA eneloop pro
- (2) with 8x AA eneloop pro
- (3) including 4x AA eneloop pro and 1 mounting ball
- (4) including 8x AA eneloop pro and 1 mounting ball
- (5) Pilot Light color temperature can vary +/- 500K
What's new
- Up to 25% faster recycle times and up to 20% more flashes per battery charge thanks to a optimised flash triggering system
- New lightweight housing with an 8% reduction of total mass (all existing accessories remain compatible)
- Redesigned optical sensing module with improved signal processing
- Direct mounting for the E-Opto converter (no optical cable in between)
- Improved TTL accuracy and TTL maximum power output
- Reinforced mode and power dials in case of impact
- Dedicated HSS mode on the control panel
The package includes
- 1x Retra Flash Pro X
- 1x Mounting ball
- 1x Allen key
- 2x spare o-rings for battery compartment
- 1x Silicone grease
- 2 year Retra Warranty
User manuals are available from our App called "Retra UWT", ready to download for free on Google Play and the App store.

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Do you have any questions?
If you need any additional information about any of our products, please don't hesitate to contact us. We usually respond within 24 hours.