Guide Number: 20
Max Depth: 200m/650ft
130° Angle of Coverage
Built in TTL Converter
A power suitable for wide angle photos, even backlit or the most technical macro, without any need to increase ISO on your digital cameras.
A high-quality light without any compromise, with a wide, uniform coverage and a slightly warm color temperature.
A modern, highly efficient electronics, versatile in use, with syncro cable and fiber-optics cable connections, supported by on-board TTL digital protocols.
A strobe simple to use, with ergonomic controls, with easy-to-read settings.
A quality product, extremely robust and reliable.
The package includes:
- Battery pack, neoprene bag
- Desktop battery charger
- O-ring set, User Guide
- 2 years warranty on strobe
- 1 year warranty on battery pack
Electronics
A project and a realization entirely Made in Italy.
Years of research, development and testing allow us to offer you state-of-the-art electronics.
The heart of this advanced electronics is a powerful CPU that manages the entire strobe with sophisticated digital communication software between the camera and the strobe, perfectly interfaced with the i-TTL protocols by Nikon and E-TTL by Canon.
This operating mode allows us to get very accurate exposure of flash light without the aid or interposition of any converter.
Auxiliary functions such as focus-pointing light and synchronization on the second curtain are also supported.
In addition to the protocols managed with a synchro cable, the s-TTL mode is also supported with signal transmission by optical fiber.
A second CPU manages the power circuits to optimize performances in every situation and maximize both duration and safety of the batteries.
Selected component with strict quality parameters and an intelligent management of all the operational functions of the strobe ensure a very high level of reliability.
Mechanics
The body is made from a solid block of anti-corodal aluminum alloy machined with ultra-modern multi-axis CNC machining centers.
The aluminum is surface treated and protected by a hard anodic oxidation with nanotech quartz coating which makes surface hydrophobic.
All control shafts are made of stainless steel with double sealing o-ring.
The various technical polymers selected for molding are extremely robust and perfectly suitable for use in water.
The robustness of the realization allows the use of strobe in all technical dives, hyperbaric tests are performed at pressures equivalent to 200 meters depth.
Controls
To obtain these results, we have designed the layout of the controls simplifying and rationalizing their functionality: no buttons, no switches, just two large lever selectors, a multifunction rotary control switch and a large, easily readable control display.
This simplification, combined with the absence of sockets and related cables near the controls, has allowed us to obtain a large maneuvering area, allowing wide visibility of the settings selected and easy operations even with gloves.
The side lever selectors, the rotary control knob, the battery compartment cap open-close selector, have been designed with strict ergonomic criteria, in order to obtain optimal operating comfort and grip safety.
The controls for their configuration are insensitive to hydrostatic pressure. You will operate them with the same effort at any depth.
Functionality
The red MAIN lever selector on the left operates the control of the pilot light (in the two available powers) and the TTL flash light reading mode, both with a synchro cable and a fiber-optic cable connections.
Protocol selection (Nikon i-TTL, Canon E-TTL, optical s-TTL) is automatic. The ⚡︎-PL-TTL control lamps indicate the flash readiness, the switching on of the pilot light and the selection of the TTL mode respectively.
The black INPUT lever selector on the right allows us to select input and connection mode that we intend to use: synchro cable socket, fiber-optic cable socket, optical receiver on reflector for slave mode. The control lamps indicate the selected SYN-OPT-SLV input.
The power control is delegated to the central rotary control switch, which operates an encoder.
In manual mode the adjustment will take place at ½ f-stop increments over a range of – 6, while if the TTL mode is selected, the control function will be dedicated to exposure compensation at ⅓ f-stop increments over a range of +/- 2.
The selected setting for power or exposure compensation are clearly visible in the center section of the large display.
Simultaneous one-hand operation of the left and right lever selectors turns the unit on and off.
Lighting
A high-quality light from the outset, a wide coverage angle, an evenly distributed power and a slightly warm color temperature: these are the guiding parameters that we have followed in designing, in shaping our light.
The choice of the lighting element was without compromise, a customized professional circular flash lamp,
We also paid great attention to the design and surface treatment of the parabolic reflector, which combined with a spherical dome port allowed us to obtain an optical design with excellent performance.
A perfectly collimated LED coaxial pilot light with two power levels that can be selected manually, or automatically with focusing, facilitates strobe pointing operations.
Power Supply
Power is supplied by a removable NiMH battery pack made with the best professional high-energy cells from Panasonic.
More than 250 flashes at full power are ensured with recharge times, electronically managed by CPU, ranging from 0.1 to 1.8 seconds.
The dedicated desktop battery charger allows fast recharging in less than two hours.
The control of the remaining charge is visible on the display every time the flash is turned on and off.
We have paid the utmost attention to safety, providing the battery pack with a short-circuit protection, making the battery compartment watertight and equipping the closing cap of the compartment with a safety valve.
Safe for transportation and use, practical and quick to replace, with a second unit you will always have available in a few moments a reserve of energy for all your needs.
No limitation for its air transport in the cabin.
Connections
The connections arranged in line on the body back make it easier to operate on the main controls and protect the cables from the stress of accentuated bending, thanks to their natural orientation.
An optical receiver is located on the front reflector for slave flash mode.
Synchro cables
All connector components are designed and manufactured in anti-corodal aluminum with hard anodizing treatment or moulded with the best technical polymers.
The connections available in our system are the classic NikonosV and the very reliable S6.
Inverted display mode
The position of the strobes is variable according to the configuration of use and the number of units.
We can use a single strobe positioned on top of the housing for the macro close up, as well as a double unit supported and oriented by arms for wide angle photography.
With this latter setting the strobes will be rotated by 180° making it difficult to read the control display in the upside down position.
The simultaneous operation of the left and right lever selectors for a given time allows the numerical indication of the central display to be inverted, making it possible to read always easily the selected values of power or compensation, regardless of the flash position.
The execution of this command is combined with the emission of a low-power flash, useful for quickly checking the operation of the strobe even without d-SRL connected.
Rotary control switch sensitivity
The sensitivity we have in operating a control in air is lost or strongly attenuated in water due to the very nature of the element.
The central rotary control has been given the correct sensitivity, even with the use of gloves, replicating and amplifying the encoder’s proprietary shots by means of a divider disk with tip marking position.
The components are made of hard anodized teflon-coated aluminum and anti-friction technical polymer.
The rotation of the control is thus fluid, precise and with the right “click” to each position.
Battery compartment cap
An important element for the safety of the system.
The body, seat of the sealing o-ring, is made of high-quality anticorodal aluminium protected by a hard anodizing treatment, the locking shaft is made of stainless steel.
The structural strength and deformation of the component, such as the verification of the specific pressure of the couplings, were calculated and analyzed by FEM simulations.
The opening is easy thanks to the ergonomic selector, made of molded technical polymer, equipped with safety release and locking in the open position.
Operational safety, in the event of any malfunction of the battery pack that generates dangerous gas inside the battery compartment, is guaranteed by the presence of a special over-pressure rilef valve made of stainless steel.
No compromise for your safety.
Power output reading
In TTL mode, the amount of light is dosed automatically.
Knowing how much is the strobe output energy in case you want to take additional shots by varying the aperture or shutter speed is useful and valuable information.
For this reason, after every shot in TTL mode, the display shows the percentage of power output supplied by the strobe.
in this way it is possible to vary the exposure parameters in the right way, always ensuring full power coverage of the strobe.
- CNC machined with high-quality anti-corodal aluminum and hard anodized
- Shooting modes: Nikon i-TTL, Canon E-TTL, s-TTL, film TTL, manual
- Circular flash lamp, warm color, on parabolic reflector with dome port
- Input by S6 synchro cable socket, Sea&Sea fiber-optic cable socket, slave sensor
- Ergonomic controls insensitive to hydrostatic pression
- Input, operating mode and power level showed on digital display
| Max energy | 157 Ws (J) |
|---|---|
| Manual mode power control range – steps | Full -6 f-stop – 1/2 |
| TTL mode EV control range – steps | ± 2 f-stop – 1/3 |
| GN Guide number ISO100-1mt | 20 |
| GN Guide number ISO100-1mt – detection angle | 20-90° | 18-110° | 16-130° |
| Beam angle | 130° (circular) |
| Number of full power flashes | over 250 |
| Recycle time | 0,2-1,8 sec |
| Color temperature | 4.600 °K |
| Pilot light | Led 200 lm 10° 2 steps |
| Power supply | interchangeable battery pack |
| Battery type and capacity | NiMH 4,8V 3050mAh |
| Battery charging time | 90 min |
| Flash arm connection | M6 threaded hole |
| Dimension Diameter x Length (controls included) | 99×200 mm |
| Weight in air battery included | 1480 g |
| Weight UW battery included (with neoprene cover) | ≈-190 g (≈ -70 g) |
| Max operating depth | 200 m |
ONEUW reserves the right to modify and improve its products at any time without prior notice.
Speedy Delivery and professional packaging
We offer a broad range of shipping options due to our long-standing partnerships with UPS, FedEx and DHL. Our warehouse personnel will pack every item to our exacting requirements. Prior to shipping, your goods are thoroughly inspected and securely secured. Everyday, we send to thousands of clients in many countries. This is an indication of our commitment to be the largest online retailer globally. The warehouses are located situated in Europe just as they are in the USA.
Note: Orders with more than one item will be assigned a separate processing period for each item.
Before shipping, we will examine thoroughly the items you've ordered. Today, most orders will be delivered within 48 hours. The delivery time varies between 3-7 days.
Returns
Due to the multiple parties involved which include the factory as well as the warehouse, we cannot effectively manage inventory. The actual levels of stock can change at any point. It is possible that the stocks could be depleted after your order has been processed.
The policy is 30 days. If you have passed 30 days in the past since you purchased and we are unable to offer an exchange or refund.
The item you purchase must be in its original packaging and not be used. It must also be in its original packaging.
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