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Sea & Sea Underwater Digital Lighting Ys-27 Dx Digital Package The new 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 to macro.
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