SeaLife Sea Dragon Universal Flash

Name: SeaLife Sea Dragon Universal Flash
Brand: SeaLife
SKU: SL963
Price: 399.00 USD
Availability: OutOfStock

SeaLife | SKU: SL963

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Product Information

The SeaLife Sea Dragon Universal Flash Head is a compact underwater strobe built for cameras with a built-in flash, restoring natural color and brightness to images down to 200 feet (60 meters). This is the head-only version of the complete SL963 Sea Dragon Universal Flash, meaning it ships without the grip, tray, or EVA travel case. It offers both Auto Mode and manual brightness adjustment from 8% to 100%, with an effective underwater range up to 8 feet (2.5 meters).

Who it is for

This flash head suits divers and underwater photographers who already have a housing, tray, or Flex-Connect arm setup and need a strobe upgrade rather than a full kit. It works with SeaLife DC Series cameras as well as Olympus, Canon, Sony, Nikon, and other camera brands that use an internal flash to trigger an external strobe. Its Auto Learn Mode syncs with a camera's pre-flash for easy setup, and Auto Mode adjusts brightness for optimal image exposure.

Key details

Guide number: 66 feet (20m) at full power, 5 feet (1.5m) at low power, ISO 100
Power adjustment: 8% to 100% in Auto or Manual mode
Beam angle: 80° horizontal by 60° vertical, widening to 100° by 100° with the included diffuser
Color temperature: 5700K, or 5400K with the diffuser; color rendering index of 98 either way
Power source: 4 AA batteries, not included; about 150 flashes on alkaline or 500 flashes on Eneloop Pro rechargeable cells
Recycle time: 1 second below half power, 5 seconds at full power
Housing: fiber-reinforced polycarbonate with marine-grade stainless steel hardware and dual NBR o-rings
Weight: 18 ounces (509 grams) with batteries installed; negative buoyancy of 75 grams in saltwater

Compatibility and sizing

The flash head is compatible with SeaLife DC Series cameras and most other camera brands with a built-in flash. It does not work with the SeaLife SportDiver Housing for Smartphones, ReefMaster RM-4K, or SeaLife Micro Series cameras, including the Micro HD/HD+, Micro 2.0, and Micro 3.0. A quick-release button detaches the head for aiming into tight spots, and it remains Flex-Connect compatible for expanding to grips, trays, or Flex Arms sold separately.

What's in the box

Sea Dragon Universal Flash head with diffuser
Optical cable with universal flash link adapter
Optical cable plug, 7mm, for Olympus and Sea & Sea housings
Spare O-rings
O-ring lubricant
O-ring removal tool

DiveCatalog.com is an authorized SeaLife dealer and a dive shop in Irvine, California since 2003. Call or chat with us at 888-701-4017 if you need help confirming fit or camera compatibility before you order.

⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Frequently Asked Questions

Is this the complete Sea Dragon Flash kit or just the flash head?

This is the head-only version of the SL963 Sea Dragon Universal Flash. It excludes the grip, tray, and EVA travel case that come with the complete kit, so it is best suited to divers who already have a tray or Flex-Connect arm and just need the strobe itself.

How many batteries does the Sea Dragon Universal Flash Head need and how long do they last?

It runs on 4 AA batteries, which are not included. Alkaline batteries deliver about 150 flashes at full brightness, while rechargeable Eneloop Pro Ni-MH batteries extend that to about 500 flashes, making rechargeables the better choice for repeated dives.

What is the recycle time between flashes?

The recycle time is 1 second when firing at less than half power and 5 seconds at full power. This affects how quickly you can fire consecutive shots, especially when photographing moving subjects at full brightness.

Will the Sea Dragon Universal Flash Head work with my camera?

It works with SeaLife DC Series cameras and most other brands, including Olympus, Canon, Sony, and Nikon, as long as the camera has a built-in flash. It is not compatible with the SeaLife SportDiver Housing, ReefMaster RM-4K, or SeaLife Micro Series cameras, including the Micro HD/HD+, Micro 2.0, and Micro 3.0.

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Model	Sea Dragon Universal Flash Head (SL9631)
Guide Number	66' (20m) full power / 5' (1.5m) low power at ISO 100
Power Adjustment	8% to 100% (Auto or Manual modes)
Controls	Power (On/Off), Test (Program), Brightness (Manual/Auto)
Beam Angle	80° horizontal x 60° vertical; 100° x 100° with diffuser
Color Temperature	5700K; 5400K with diffuser
Color Rendering Index	98 (with or without diffuser)
Power Source	4 AA batteries, not included
Battery Life	150 flashes (alkaline); 500 flashes (Eneloop Pro rechargeable)
Recycle Time	1 second (less than 1/2 power); 5 seconds (full power)
Buoyancy	Negative; -75 grams in saltwater
Housing Material	Fiber-reinforced polycarbonate
Hardware	Marine-grade stainless steel
O-rings	Dual NBR o-rings with lubricant
Weight	18 ounces (509 grams) with batteries
Dimensions	5" x 4.5" x 2.5" (12.7cm x 11.4cm x 6.4cm)
Depth Rating	200 feet / 60 meters
Effective Underwater Range	Up to 8 feet (2.5m)