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Dive Photo Guide


Sea&Sea Announces YS-03 Solis Strobe
By Ian Bongso-Seldrup, February 19, 2020 @ 08:00 AM (EST)

Sea&Sea has announced an updated version of its entry-level YS-03 strobe. Like its predecessor, the YS-03 Solis is aimed at photographers who don’t want to fuss with strobe settings, and are happy to leave the TTL function to do its magic. There’s just one switch on the strobe: OFF/TTL. The strobe is compatible with any camera with a pre-flash and a TTL flash exposure function.

The YS-03 Solis features a guide number of 20, a beam angle of 100° by 100°, and is depth-rated to 250 feet (75 meters). The strobe has an Auto power OFF function and an over-pressure relief valve, and comes with a diffuser and a YS mount. Comparing the specifications with those of the older strobe, the recycle time has been improved: 1.9s vs 2.5s when using Ni-MH (2500mAh) batteries, or 2.5s vs 3.1s when using standard AA batteries. The improved target light can now also serve as a dive light.

The YS-03 Solis costs $350 and is available from Backscatter. The original YS-03 has been discontinued.

When purchasing underwater photography equipment like the products mentioned in this article, please support DPG by supporting our retail partner—Backscatter.com.




Easy and Versatile Slave TTL

As the YS-03 SOLIS has been designed to mimic the light intensity of the camera’s built-in flash, it is not necessary to manually adjust output. The YS-03 SOLIS is compatible with any camera with a pre-flash and that has a TTL flash exposure function, regardless of make.

Taken without strobe (ambient light) Taken with the YS-03 SOLIS


Simple Controls

The YS-03 SOLIS has been designed for any underwater photographer to use and is easy to understand. The only control is the rotary power switch and by simply turning the switch from OFF to TTL you can take beautiful images.

Charged and ready to trigger TTL exposure confirmed


Comes with diffuser as standard

The half-translucent section diffuses and softens the light from the strobe. Using the diffuser gives softer, more evenly exposed images. The diffuser will also help reduce effects of overexposed images or when strong light produces shade/shadow in the image.

Diffuser No diffuser



  • [Guide Number (ISO 100/m) (land)] 20
  • [Beam Angle] 100° x 100° (with diffuser 110° x 110°)
  • [Batteries] 4xAA A: 6V Ni-MH: 4.8V
  • [Number of Flashes] A: 230 Ni-MH(2500mAh): 300
  • [Recycle time (full)] A: 2.5 sec. Ni-MH: 1.9 sec.
  • [Color temperature] 5600K
  • [Color temperature w/diffuser] 5250K
  • [Depth rating] 75m / 250ft
  • [Dimensions (WxHxD)] 68x108x129mm / 2.7x4.3x5.2inches
  • [Weight] 430g / 15.2oz (w/o batteries) * Fixing bolt fitted
  • [Underwater weight] Approx. +10g / 0.4oz (w/ batteries)
  • [Others]
    • Auto power OFF function
    • Sync cord: Fiber-Optic Cable
    • Over-pressure relief valve



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