YS-D3 Duo Strobe

The YS-D3 DUO is a high-specification underwater strobe with three shooting modes: DS-TTL, RC mode, and manual. Custom settings allow the strobe to be used with high precision with a variety of cameras and shooting styles. 

This powerful high-spec strobe has three shooting modes and custom settings that allow high precision with a wide range of cameras and shooting styles. Select from DS-TTL, RC or manual mode with ergonomic large controls conveniently identifiable by color so they’re visible even when night diving. The strobe is powered by easy-to-source AA batteries.

The YS-D3 DUO is an underwater strobe specifically designed to be compatible with the "Wireless RC Flash System" of OM SYSTEM digital cameras. The "RC System" is a light control mode wherein the camera automatically regulates the flash output based on the brightness detected through the lens. This system utilizes a digital optical signal to achieve precise control over the light, surpassing the typical TTL mode found in most underwater strobes. It allows for fine-tuning of the light intensity through options such as flash/non-flash selection or manual operation.

Highly accurate DS-TTL dimming

The "RC System" is a flash system for OM SYSTEM digital cameras, and the YS-D3 DUO was developed in collaboration with OM Digital Solutions to incorporate the RC mode.

RC mode is a light control mode in which the camera automatically controls the flash output based on the brightness through the lens. The YS-D3 DUO is equipped with a more precise "RC mode" that was developed based on system information officially provided by OM Digital Solutions. The YS-D3 DUO is equipped with a more precise "RC mode" developed based on the system information officially provided by OM Digital Solutions.

Manual mode has 11 steps

In manual mode, light intensity can be adjusted in 11 steps. The settings are (GN: 1 / 1.4 / 2 / 2.8 / 4 / 5.6 / 8 / 11 / 16 / 22 / 33). The value can be easily seen on the scale on the light intensity adjustment dial. Compatible with digital cameras that do not have a pre-flash function.

Uniform and even light distribution

The originally developed "aspherical toroidal lens" is placed in front of the light-emitting tube, and the two discharge tubes and the "aspherical toroidal lens" provide uniform and even light distribution to the periphery, making it an ideal light source for external illumination.

Adjust beam angle with diffuser

The beam angle is 80°×105° without the diffuser and 100°×110° with the included diffuser for soft lighting. When the optional dome diffuser* is attached, the beam angle increases to 150°×170°. The dome diffuser is effective when using a fisheye lens or when lighting with soft light (guide number is reduced by approximately -1.5 EV). *Dome diffuser sold separately.

Easy-to-read backlit panel

The indicator color changes each time the mode switch is repositioned. Blue (in DS-TTLII mode), red (in RC mode), yellow (in manual mode with pre-flash), and green (in manual mode without pre-flash) are the different colors for identification, so positioning of the controls is easy to see even when night diving.

Underwater Balance

YS-D3 DUO has almost zero buoyancy with the ball mount and clamp in place. Heavy underwater weight requires unexpected force to operate the clamp, but the YS-D3 DUO is unaffected by buoyancy, so operation is smooth. Even if you change the strobe position, the underwater balance of the entire housing set does not change significantly and you can feel how easy it is to handle.

Two patterns of target lights

The LED target light function is useful for focusing and checking the beam angle of the strobe. Choose either 300 lumens or 150 lumens depending on the situation.

Specifications

CAUTION
* Use of genuine SEA&SEA Fiber-Optic Cables is recommended. SEA&SEA strobes may not function properly if a third-party Fiber-Optic Cables are used (functions such as TTL auto exposure in particular).

*Do not use non-recommended batteries (such as lithium primary batteries). Use of non-recommended batteries may cause battery leakage and overheating and may cause the strobe to rupture, which could result in personal injury.