A TTL-only strobe with exceptional cost performance. This strobe will not function properly with cameras that do not emit a pre-flash.
Circular beam angle of 100°x100° and guide number of up to 20. The YS-03 is a new compact-type slave strobe that can be used from wide-angle to macro photography.
The Sea & Sea YS-03 underwater strobe has only one control; off / TTL on
Power comes from four AA batteries for a powerful and long-lasting strobe, so you can enjoy taking pictures all day long without having to recharge the batteries. The recycle time takes about two and one/half seconds with nickel-metal hydride batteries (2700 mAh) for stress-free continuous shooting.
Some digital cameras adjust flash levels after a first flash and then capture an image with a second (main) flash. This first flash is called the pre-flash.
Guide Number (ISO 100/m) (land) 20
Beam Angle 100°x 100°
Batteries 4xAA, alkaline or NiMH
Recycle time (full) Alkaline battery: 2.5 sec. Ni-MH: 1.9 sec.
Number of shots: Alkaline approximately 230, NiMH approximately 330.
Color temperature: 5600K
Color temperature w/diffuser: 5250K
Depth rating] 75m / 250ft
Dimensions (WxHxD) 68x108x129mm / 2.7 x 4.3 x 5.2inch
Weight without battery: 445g / 15.6oz
Underwater weight with typical battery: -10g / -0.4oz