The Sea & Sea YS-D1 Lighting Package with Sea Arm VII consists of a YS-D1 strobe, a Sea Arm VII Compact, a Fiber Optic Sync Cable L-Type, and a Strobe Mask Set. The YS-D1 is the most sophisticated strobe Sea & Sea has produced in its 4-decade history. This compact light is 25% more powerful than the YS-110α! It features beam angles of 80 x 80°, 100 x 100° and 120 x 120° via GN / guide numbers 32, 24 and 20, respectively. The strobe is equipped with 3 TTL circuitries: DS-TTL II, Slave TTL, and conventional Nikonos type. Powered by 4x AA batteries, the YS-D1 has a recycle time of 1.9 sec with Ni-MH batteries. It has DS-TTL II exposure compensation of (EV): + / - 4 steps. It offers manual exposure control in 11 steps. The strobe boasts an impressive depth rating of 330' (100 m).
On the intuitive YS-D1, Slave On / Off happens automatically, without a switch. There's a ratcheting light level control, as well as a 3-color LED indication lamp: Ready lamp (red), TTL confirmation lamp (green), and Slave TTL mode lamp (blue). The strobe also has an LED target light.
The D1 features an over-pressure relief valve, an Auto power OFF function, and a pre-flash cancellation mode. It produces a color temperature of 5600 K without a diffuser, or 5250 K with a diffuser. A diffuser 120 and a diffuser 100 are included with the strobe. The D1 is compatible with 5-pin sync cords or N and fiber-optic cables (L-type).
Consumer-friendly, the strobe is compatible with the majority of digital cameras. It comes with both a conventional YS adapter mount and a ball joint mount, so you can use whichever one you prefer.
Examples of compatible systems for this strobe include the PT-048 underwater housing for the Olympus TOUGH-8010; the Sea & Sea DX-GE5 compact digital camera and housing set; the DMW-MCFT3 marine case for the Panasonic LUMIX DMC-FT3; the WP-FXF200 housing for the Fujifilm FinePix F200 EXR; the WP-DC34 marine case for the Canon Power Shot G11; the PT-050 housing for the Olympus XZ-1; the MDX-D7000 housing for the Nikon D7000; and the RDX-600D housing for the Canon EOS Rebel T3i / 600D / Kiss X5.
The included Sea Arm VII Compact is used with housings for compact digital cameras and the RDX-series housings for digital SLR cameras. Constructed of plastic reinforced with glass fiber, it's made up of a head, a double ball-jointed arm, a camera base, and a ball base. The Sea Arm's length is approximately 18" (45 cm).
The Fiber Optic Sync Cable L-Type connects the strobe to the underwater housing. When the camera's flash fires, the cable will fire the external flash.
The Strobe Mask Set includes both a strobe mask and grommet. The mask blocks the camera's flash from exposing your subject, which prevents backscatter. The grommet permits the cable to be attached in front of the flash, so that the light from the flash will trigger the strobe.