Ikelite DS51 II 50WS TTL Underwater Strobe



Ikelite DS51 II 50WS TTL Underwater Strobe

The Ikelite DS51 II 50WS TTL Underwater Strobe is a travel ready strobe that offers a lighter weight, brighter TTL and remote slave strobe offering with a Clear View battery compartment seal. USA Made.

If size and weight are your primary deciding factors, the DS51 II is for you. The DS51 II is one of the smallest and lightest strobes in its class weighing in at less than one pound (443g) per strobe. The compact size makes it simple to position the strobe for macro, super macro, and close focus wide angle.


You won’t need a pair of tweezers to set the DS51 strobe. The strobe power/exposure mode switch is prominent on the rear of the strobe with a bright white detail makes it easy to see where it’s pointing.

When used in TTL mode together with a compatible TTL converter, your camera will meter the scene and adjust strobe power automatically.

True TTL Exposure

TTL flash exposure takes advantage of your camera’s sophisticated light metering system to automatically adjust flash output. In TTL flash mode the camera triggers a pre-flash – before the image is captured – and uses information it receives back to adjust output in time for the photo. Our line of proprietary TTL converters translates this signal for correct flash exposure underwater with Ikelite DS strobes. Simply leave the strobe in the TTL setting and focus on composition and camera exposure settings.

The advantages of TTL metering are far greater than simply variable flash output. TTL improves recycle time, enables burst shooting, and saves battery life of both your camera and your strobe. TTL is critical when shooting fast-moving subjects both large and small.

In this situation, the turtle would be silhouetted without the flash of a strobe hitting its underside. When you’re shooting a fast moving subject like a turtle, your distance-to-subject is changing constantly. TTL strobe exposure is essential because it’s impossible to manually change strobe settings as quickly as the turtle is moving. Photo © 2021 Caitlin Hale Dive Friends Bonaire

Mix and Match

Most shooters choose a one or two DS51 II strobes for macro and dual DS51 II strobes for wide angle. Combining the DS51 with brighter strobes like the DS160 II, DS162, or DS230, can also add depth and contrast to your images. Attach the less powerful strobe as a secondary when mixing strobes of different intensity.

Flexibility in Triggering

The DS51 II supports a wide variety of triggering methods to fit virtually any application in, out of, and around the water.

Trigger the DS51 II directly from your camera using either an electrical sync cord with ICS-5 plug or by adding an optional fiber optic converter.  The DS51 II supports exposure communication with most popular camera models using our line of high-accuracy TTL converters.

Remote triggering is supported by both optional extension cords and/or optical slave converter. Position your strobes at a distance from your camera for a variety of creative lighting set-ups including cave lighting, off-camera wreck lighting, and pool studio photography.

When using an optical slave or fiber optic trigger, each strobe needs its own triggering device. When using a DS Link TTL Converter, connect two strobes using a dual Y-shaped sync cord.

If you’re unsure which connection is right for you, reach out to us for the right advice. We’ll need to know the make and model of camera and housing you’re shooting along with your shooting location and subject matter.

When lighting a macro subject it can be easy to end up with a flat looking image. If you’re shooting two strobes try angling your strobes slightly differently or positioning one slightly forward of the other to improve visual dimensions. Photo © 2021 Caitlin Hale Dive Friends Bonaire

The Proven Leader in Underwater Lighting

Ikelite was the first to introduce these underwater strobe technologies which are considered standard today: aiming lights, interchangeable cords, removable battery packs, smart charging, battery power indicators, wireless TTL slave sensors, built-in video lights, and TTL communication with digital cameras.

We have the longest track record in the design and manufacture of professional strobe lighting for underwater use. We offer the only underwater strobes designed and manufactured in the USA and distributed worldwide to over 95 countries.


Depth rating: 100 meters (330 feet)

Power: 1 to 50 Ws

Coverage angle: 80º with included diffuser

Power control: 6 stops in 1/2-stop increments

Color temperature: 5700K

Guide number at 1m (ISO 100): 17 full power

Flashes per charge: 300 to 1000 dependent on power setting

Recycle time: 0.1 to 3.5 seconds dependent on power setting

Electrical sync connection: Ikelite ICS 5-pin bulkhead

Battery: 4 AA cell alkaline, NiMH, or NiCad (not included)

Dimensions: 81 mm diameter x 119 mm length (3.2″ x 4.7″)

Weight: 443 grams (0.97 pounds) without batteries or mount

Buoyancy: Neutral in fresh water

In the Box

DS51 Strobe

Battery Door # 9440.45 (installed)

Diffuser # 0561.2 (installed)

1″ Ball Mount # 4081.4 (installed)

Waterproof bulkhead cap # 9104.7 (installed)

Silicone lubricant 1cc tube

2 year limited warranty

Buy Ikelite Strobes, Housings and Accessories Online in Canada with Free Shipping from Dan’s Dive Shop, a Top Stocking North American Ikelite Dealer.


Additional information

Weight 4 kg
Dimensions 24 × 15 × 15 cm


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