Sea&Sea YS-D1 Strobe

Equipped with SEA&SEA’s new slave TTL system called “DS-TTL ll”
Revising the algorithms used for the DS-TTL system, the YS-D1 employs a totally new slave TTL system. The strobe can adjust the interval between the pre flash and the primary flash in order to be compatible with a wide-variety of cameras, if not all, on the market today. The strobe is equipped with DS-TTL ll mode which is more responsive, more precise and more reliable. The DS-TTL ll enables a variety of strobe sync photography such as slave TTL and slave manual (11 steps) with compact or digital SLR cameras. When used with a digital SLR camera in housing, the strobe can also be connected with a conventional sync cord and through a YS Converter for TTL strobe photography. In a clear water environment, two YS-D1 strobes in DS-TTL ll mode provide perfect lighting. When you would like to emphasize contrast, setting the main strobe in DS-TTL II mode and the secondary strobe in manual mode (11 steps) offers flexibility without limiting control. When underwater visibility is poor, two YS-D1’s set to manual mode may produce the best images.

The YS-D1 is the most versatile underwater strobe available today. The DS-TTL exposure compensation function enables subtle lighting control by adjusting the Light Level dial in DS-TTL mode.

Powered by only four AA batteries, the YS-D1 offers a maximum light output of Guide Number 32
Compared to the YS-110Alpha, the YS-D1 is 1EV more powerful, 50g (1.8oz) lighter and 10% smaller. Not only is the YS-D1 suitable for macro photography, but also is robust enough for wide-angle photography. it is also ideal for macro photography which requires delicate light level control. The strobe’s guide number can be reduced to 1. Highly versatile, the YS-D1 offers more automatic and manual control over lighting to get that perfect exposure.

The YS-D1 is the world’s first slave TTL strobe equipped with an exposure compensation (EV) control function
By controlling the actual flash light level, the strobe realizes accurate exposure compensation with EV value. Regardless of a compact or a SLR camera, you can achieve any desired exposure compensation. However, many TTL systems are not reliable. The YS-D1’s DS-TTL exposure compensation function allows users to adjust the light level in TTL mode (-1.5EV, -1EV, -0.7EV, -0.3EV, +0.3EV, +0.7EV, +1EV, +1.5EV).