It represented a radical new development in flash technology. Introduced in 1997, it was (and still is) the world's smallest (it fits neatly into the palm of your hand), lightest (less than a pound), submersible strobe that syncs for TTL flash photography in slave mode without a sync cord!Incorporates the unique electronic Duo circuitry to automatically adapt for TTL flash photography with both four and five-pin sync connectors 55º x 80º beam TTL slave capabilities are ideal for multiple strobe applications Super small flash head is ideal for single strobe macro photography Exposure control: Manual and TTLBeam angle: 55º x 80ºGuide number (ISO 100, land): 66/20 (ft/m)Recycle time: 4 sec. (ni-cad), 5 sec. (alkaline)Number of flashes (full power): 250 (alkaline), 140 (ni-cad)Color temperature: 5900º KSlave function: Built in TTLPower source: 2 AA alkaline or ni-cad batteries Maximum depth: 200 feet/60mWeight: .91 lb

Cameras:
YS-30TTL Duo Strobe

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It represented a radical new development in flash technology. Introduced in 1997, it was (and still is) the world's smallest (it fits neatly into the palm of your hand), lightest (less than a pound), submersible strobe that syncs for TTL flash photography in slave mode without a sync cord!Incorporates the unique electronic Duo circuitry to automatically adapt for TTL flash photography with both four and five-pin sync connectors 55º x 80º beam TTL slave capabilities are ideal for multiple strobe applications Super small flash head is ideal for single strobe macro photography Exposure control: Manual and TTLBeam angle: 55º x 80ºGuide number (ISO 100, land): 66/20 (ft/m)Recycle time: 4 sec. (ni-cad), 5 sec. (alkaline)Number of flashes (full power): 250 (alkaline), 140 (ni-cad)Color temperature: 5900º KSlave function: Built in TTLPower source: 2 AA alkaline or ni-cad batteries Maximum depth: 200 feet/60mWeight: .91 lb

From: Sea and Sea

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