Tech Info Sea&Sea YS-250 Pro Underwaterflash strobes
Amazing power to help you capture any subject you aim at the YS-250PRO is designed for demanding professionals, packed with revolutionary new features to meet the challenges of digital photography. A large circular arc tube emits a powerful flash at guide number 32 (its value on land, ISO 100/m) when power is set to FULL. It provides incremental manual flash power adjustment in 12 steps for graduations of light. The YS-250PRO is lightning fast: it recycles in 1.8 seconds. Its high-capacity Ni-MH battery, designed exclusively for the strobe, stores enough power when fully charged for 200 full flashes. A high-luminosity white LED target light in the center of the strobe shows precisely where the strobe is pointed, and a ready lamp and a TTL confirmation lamp on each side of the strobe indicate when the strobe is charged and when it has been controlled by the camera’s TTL. An audible signal sounds when the lamps light so you can concentrate on your subject in the viewfinder.
[ Sea&Sea YS-250 Pro Underwaterflash strobes]
[Guide Number (ISO 100/m) (land)] 32
[Beam Angle] 105°x 105° (with diffuser 115°x 115°)
[Batteries] Battery for YS-250PRO
[Number of Flashes*1] 200
[Recycle time (full)*2] 1.8
[Color temperature] 5,600K
[Color temperature w/diffuser] 5,200K
[Depth rating] 60m / 200ft
[Dimensions (WxHxD)] 107x130x223mm / 4.3x5.2x9inch
[Weight] : 1,383g / 48.4oz (w/o batteries) * Attached a fixing bolt to the Strobe.
[Underwater weight] : 80g / 2.8oz(w/ batteries)
□Exposure control: TTL, Manual(Light-level control)
GN 0.7/1/1.4/2/2.8/4/5.6/8/11/16/22/32 (12 steps)
- Pre-flash control: Equipped with pre-flash cancel mode
- Slave function
- Sync cord: 5-pin Sync cord/N17100, Fiber-Optic Cable (L-type)
- Over-pressure relief valve
- LED target light
- Test flash function
- TTL / READY confirmation audible signal
*1 Number of flashes and recycle time depends on the battery brand, temperature and frequency of use. *2 Number of flashes and recycle time of Ni-MH batteries were tested on 2700mAh batteries.