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The YS-27DX strobe is designed for multipurpose underwater photography. This new strobe has beam angle of 105° x 84° and a guide number of up to 20 (ISO 100 / m) / 66 (ISO 100 /feet), providing spread and power for subjects that range from wide-angle macro.
The light level control dial of the YS-27DX has nine different light level controls, which increments from a minimum power of GN 1.7 to a maximum power of GN 20 (1EV step). The light level control dial makes you to take ideal pictures, precisely adjustable to get just the right amount of light for the subject at hand.
The YS-27DX offers a pre-flash cancel mode (*1) that ensures the strobe won't fire prematurely when used with digital cameras that emit a small pre-flash burst before the main flash. This strobe is compatible with most digital cameras that have a pre-flash An optional fiber optic cable accurately synchronizes the strobe with your digital camera's built-in flash.
The YS-27DX's power source is four AA batteries, which provide strength and endurance for a full day's shooting without changing batteries. The recycle time of YS-27DX with 2700mAh nickel-metal-hydride batteries is only two seconds, providing speedy recovery for a rapid series of images. SEA&SEA adopts the dela-prism, which spread soft and delicate lighting of subjects, for YS-27DX.
The YS-27DX is an ideal slave sub-strobe for a digital SLR camera housing. It detects light fromthe main strobe's Flash and immediately fires in synchonize with the main strobe.
*1 Some digital cameras adjust flash levels after a first flash and then capture an image with a second flash. This first flash is called the “pre-flash.” The strobe’s pre-flash cancel function ignores the pre-flash and synchronizes the strobe with the second flash.
*The YS-27DX is not compatible with digital cameras that emit two or more pre-flashes.
Specifications:A: Alkaline, O: Oxyride, Ni-MH: Nickel-Metal-Hydride
Guide Number (ISO 100/land) : 20
Beam Angle : 105° x 84°
Batteries 4xAA : A: 6V / O: 6V / Ni-MH: 4.8V
Number of Flashes*1 : A: 350 / O: 420 / Ni-MH: 490
Recycle time (full)*2 : A: 2.5 / O: 2 / Ni-MH: 2
Color temperature : 5500K
Color temperature w/diffuser : 5200K
Depth rating : 60m / 200ft
Dimensions (WxHxD) : 87x122x135mm / 3.4x4.8x5.3inch
Weight : 540g / 19oz
Under water weight : -40g / -1.4oz
Exposure control: Light-level control from GN 1.7 to GN 20 (in 9 increments) with a manual controller
Pre-flash control:Equipped with pre-flash cancel mode (ignores one pre-flash)
Slave function
Sync cord: Fiber-optic cable (L-type) for compact digital cameras
Over-pressure relief 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 2700mAh batteries.