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Ikelite DS-51 II Underwater Photo Strobe

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Ikelite DS-51 II Underwater Photo Strobe

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Ikelite DS-51 II Underwater Photo Strobe

Travel Ready

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.

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.

In the Box

  • DS51 Strobe
  • Battery Door # 9440.45 (installed)
  • Diffuser # 0591.2 (installed)
  • 1" Ball Mount # 4081.4 (installed)
  • Waterproof bulkhead cap # 9104.7 (installed)
  • Silicone lubricant 1cc tube
  • 2 year limited warranty
Guide Number:
Strobe Beam Angle:
70°, 80° w/ Diffuser
AA x 4
Flashes at Full Power:
Recycle Time:
3.5 sec
Color Temp:
Depth Rating:
90m / 295ft
81 x 119mm / 3.2 x 4.7in
590g / 20oz
Buoyancy :
Neutral Buoyancy in Fresh Water
Manual and TTL Capabilities:
TTL (Ikelite TTL Systems) / Manual
Sync Cord Compatibility:
Focus Light:
Mounts Included:
Ball Mount
  • Depth rating: 100 meters (330 feet)
  • Power: 1 to 50 Ws
  • 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: 91 mm diameter x 179 mm length (3.6" x 7")
  • Weight: 443 grams (0.97 pounds) without batteries or mount
  • Buoyancy: Neutral in fresh water
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