Expanding on the popular YS-25DX, SEA&SEA has integrated automatic light adjustment to offer the first compact auto-strobe for digital underwater cameras. By adjusting the aperture of the digital camera and matching it on the YS-25AUTO, the amount of light is automatically adjusted depending on the filming distance. The pre-flash controller prevents the strobe from accidentally firing as a result of red-eye reduction pre-flash. An optional fiber-optic cable is available to ensure strobe synchronization. The optional DX STAY and flexible DX ARM and Sea Arm Light allows you to move the strobe to any position, giving you full control of how and where your subject is lit. Not only is the YS-25AUTO great for underwater photography, but it can also be used topside to expand the limited capability of the digital camera's built-in flash.

Specifications:

* Guide Number (ISO 100/land) :15
* Beam Angle : 80x90
* Batteries 2x AA:Alkaline : 3V / Ni-MH: 2.4V
* Number of Flashes*1 : Alkaline: 200 / Ni-MH: 320
* Recycle time (full)*2:Alkaline : 5 / Ni-MH: 3
* Color temperature : 5300K
* Color temperature w/diffuser :5000K
* Depth rating : 50m / 165ft
* Size (WxHxD) : 81x88x116mm / 3.2x3.5x6.6inch
* Weight : 410g / 14.4oz
* Under water weight : +6g / 0.2oz
* Exposure control: Light-level control: AUTO (Aperture) Controller: f2/2.8/4/5.6/8/11 (6 steps)
* Pre-flash control: Equipped with pre-flash mode
* Slave function
* Sync cord: Fiber-optic cable for the YS-25 with a compact digital camera
* Over-pressure release valve
* *1 Number of flashes and recycle time depend on the battery brand, temperature and frequency of use.
*2 Number of flashes and recycle time of Ni-MH batteries were tested by 2400mAh batteries.