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Sea & Sea YS-D3 Duo Underwater Strobe

BH #SEYSD3DUONC • MFR #SS-03129
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Sea & Sea YS-D3 Duo Underwater Strobe
Key Features
  • Depth Rating: 328'
  • Maximum Guide Number 33
  • OM RC, TTL & Manual Flash Exposure
  • 105° Angle | 110° with Diffuser
Illuminate the underwater world in rich, natural color as deep as 328' with the YS-D3 Duo Underwater Strobe from Sea & Sea. This strobe is compatible with Olympus OM RC, as well as traditional TTL and manual operation. The flash has a wide beam angle of 105°, which gets even wider at 110° with the included diffuser. A daylight-balanced color temperature of 5800K (5500K with the diffuser) enables the strobe to restore colors that are absorbed underwater, thus allowing for more vibrant and accurate images. Aspherical troidal lenses on the flash tubes provide even light dispersion with no hot spots. The strobe is equipped with a 150/300-lumen LED target light.
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Sea & Sea YS-D3 Overview

Illuminate the underwater world in rich, natural color as deep as 328' with the YS-D3 Duo Underwater Strobe from Sea & Sea. This strobe is compatible with Olympus OM RC, as well as traditional TTL and manual operation. The flash has a wide beam angle of 105°, which gets even wider at 110° with the included diffuser. A daylight-balanced color temperature of 5800K (5500K with the diffuser) enables the strobe to restore colors that are absorbed underwater, thus allowing for more vibrant and accurate images. Aspherical troidal lenses on the flash tubes provide even light dispersion with no hot spots. The strobe is equipped with a 150/300-lumen LED target light.

The backlit control panel shines different colors for the different modes: blue for DS-TTL II, orange for OM RC, and green for manual. The YS-D3 Duo has a 5-pin sync cord connector and a fiber-optic port for connection to an underwater camera housing.

Depth Rating
  • Safe for use at depths up to 328'
  • Features an overpressure relief valve
Guide Number
  • Maximum: 33
Coverage
  • 105 x 80° beam angle, 110 x 100° with included diffuser
  • Diffusers help create soft, even light to reduce glare, backscatter, and hard shadows
Color Temperature
  • Color temperature of 5800K enables the strobe to restore colors absorbed underwater for more vibrant and accurate images
  • With the diffuser in place, the color temperature is 5500K
Target Light
  • Two brightness levels
  • Bright enough to use as a dive light
Controls, Modes, and Operation
  • Olympus OM RC, DS-TTL, slave TTL, and manual flash exposure modes are available
  • Eleven manually selectable light levels
Power Source
  • Four alkaline or NiMH AA batteries
  • Recycle time is 3.5 seconds with alkaline batteries and 1.7 seconds with NiMH cells
  • Flash features an audible charge signal
Connectivity
  • Configured with a 5-pin sync cord connector and a fiber-optic port for connection to an underwater camera housing
  • Fiber-optic connection cables are required and sold separately
Mounting
  • Removable straight-type base ball mount
UPC: 752221031294

Sea & Sea YS-D3 Specs

Light
Item Type
1x Underwater Strobe Light
Guide Number
33' / 10.06 m at ISO 100 (on Land)
Color Temperature
5800K
Beam Angle
105°
110° with Included Diffuser
Exposure Control
Manual, TTL
Secondary Illumination
Modeling Light
Strobe I/O
1x Fiber-Optic Input
1x N-Type 5-Pin Sync Cord Input
Wireless Remote Control Type
No
Mounting
1" Ball Mount, YS Mount
Battery
4x AA Alkaline (Not Included)
 • 140 Flashes
 • 3.5-Second Recycle Time
or

4x AA NiMH (Not Included)
 • 220 Flashes
 • 1.7-Second Recycle Time
Environmental Resistance
Water-Resistant to 328' / 100 m (Unrated)
Dimensions
5.8 x 4.4 x 3.6" / 14.73 x 11.18 x 9.14 cm
Weight
21.5 oz / 0.6 kg (without Batteries)
Packaging Info
Package Weight
1.71 lb
Box Dimensions (LxWxH)
7.3 x 5.3 x 4.8"

Sea & Sea YS-D3 Reviews

See any errors on this page?

what does the over pressurization valve do?

what does the over pressurization valve do?
Asked by: Russell
The overpressure relief valve on the Sea & Sea YS-D3 Duo Underwater Strobe protects the strobe from damage caused by internal pressure. The flash creates heat and pressure and the valve opens to release the excess pressure.
Answered by: Dan W
Date published: 2026-06-14
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