Combine the compact and easy to use ReefMaster RM-4K with the wide beam of the Sea Dragon 2000F and you have the perfect compact package for exploring reefs, wrecks and deeper dives were lighting will make your images and videos shine with color. The Sea Dragon 2000F has an easy one button design that cycles through three light intensity settings and has a rechargeable battery that lasts an hour at full power (2000 lumens).
Have a look at our photo gallery and see the amazing images captured with the SeaLife ReefMaster RM-4K.
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The SeaLife RM-4K features brilliant 14mp still images and vivid 4K video in a incredibly small package that’s easy to hold and use alone or with attached lights like the SeaLife Sea Dragon. The ultra-compact removable inner camera and a robust external housing that mounts easily to a light tray. The easy, 4-button control system makes catching the action an effortless process. The ReefMaster offers WiFi sharing ability, so you can wirelessly preview, download and share pictures & videos to a smart phone or tablet with the free ReefMaster app from Google Play Store or Apple App Store.
The easy to hold ergonomic housing was especially designed for use underwater, while the housing is easy to hold and use even with one hand, the tough enclosure also features a unique closing system – a “Pressure Lock” thumb screw that exerts the optimal amount of pressure on the housings O-ring seal. The waterproof housing encases the small inner camera, and also stores a powerful drying agent called “Moisture Muncher” next to the camera that prevents internal fogging caused by heat and humidity trapped inside the housing.
With the expandable memory of the ReefMaster RM-4K, you can use Micro SDHC memory cards up to 128GB, ensuring you have room to shoot & save all of your video content. It also has a time lapse function – shooting at set time intervals and saves as video file or series of still images. For optimal results, especially when shooting 4K video, use Micro SDXC Class UHS Class 3 (U3) or Video Class 30 (V30) memory cards.
Lighting is easy, use the ReefMaster RM-4K with Sea Dragon constant underwater LED photo/video lights (or other LED light sources). There’s no flash or cable to sync to an external strobe. Simply turn your light on and adjust the intensity based on the subject, conditions and distance.
The new Sea Dragon 2000F UW photo-video light delivers 2000 true lumens and a smooth, even 120° wide beam angle. This revolutionary COB LED technology produces an 80 CRI (color rendering index) that mimics natural daylight. Includes Battery and charger with international plug adapters, Flex-Connect Micro tray and grip. Also try the optional 10x close-up or super macro lenses. The sharp 2.0” TFT color LCD display is easy to see in all light conditions and will help keep the lens on your subject.
For the latest app and technical updates, visit our technical updates and troubleshooting page.
14 megapixel Panasonic® CMOS image sensor for sharp colorful pictures
4K Ultra HD Video @ 30fps and 1080p HD video @ 60 fps
40m/130ft compact underwater housing with removable inner camera
140° Fisheye Lens – Get close to your subject and still fit everything into the picture
Underwater color-correction modes – Underwater Deep for diving and Underwater Shallow for snorkeling
Easy 4 button controls for easy operation
Wi-Fi – wirelessly preview, download and share pictures/videos to smart phone or tablet with “SeaLife ReefMaster” app (free download from Google Play Store or Apple App Store)
Image Stabilization – Electronic stabilization reduces vibration and hand movement for smoother video recording
Expandable memory using micro SDHC/SDXC memory card up to 128GB
Waterproof to 130ft / 40m
Compact design for easy handling and lightweight travel
Focus from 12” (30cm) to infinity (10X Close-up Lens or Super Macro Lens optional accessory)
Time lapse shooting at set time intervals – saves as video file or series of still images
Removable Li-ion rechargeable battery – 900 mAh / 3.8V / 3.42Wh for 2+ hours video or 500+ images
2.0” 230K Hi-res TFT color LCD
Expandable with popular SeaLife accessories (One or two Sea Dragon Photo-Video-Dive Lights, Close-up Lens, Super Macro Lens)
Powerful 2000 lumen LED light. Latest COB LED array technology. True, lab-tested lumens and not “theoretical” lumens specified by most other manufacturers.
One button control for easy operation. One button to power light on/off and select brightness
Three brightness levels 100%, 50% and 25%
Hidden emergency signal mode. 1 sec blink interval and SOS Morse code. Push and hold power button for 4 seconds to activate.
60 minute run time at full power
Constant brightness – Regulated circuitry so light won’t dim with battery power.
80 Color Rendering Index (CRI) that mimics natural daylight.
Easy to expand with Flex-Connect™ trays, grips, arms, cold-shoe, ball joint and Y-S adapters.
Quick-release button to detach light and aim in crevices and hard to reach areas
120° wide beam angle evenly illuminates the subject with no hot spots.
Depth tested to 330ft (100m) – Guaranteed
Corrosion-proof metal light head for heat dispersion and durability
Removable 25W Li-Ion battery w/ charger and international plug adapters included
Waterproof battery compartment – even if the O-ring seal fails, the battery compartment is isolated so water cannot reach the internal electronics.
Free App Name: ReefMaster in App & Play stores
Focal Length: 2.5 mm (35 film equivalent = 14mm)
Focus type: Instant fixed-focus lens
Shutter response time: 0.30 seconds (AKA Shutter Lag)
Focus Range: 12 inches to Infinity (30cm to infinity)
Field of View*: 140° diagonal Fisheye Wide Angle Lens
Shutter speed: 1/25 to 1/2000 second
Shooting modes: Single, Burst (3, 7, 15 or 30 photos @ 1 photo/sec), Time Lapse Photo and Time Lapse Video
White Balance (WB): Auto, Underwater Shallow, Underwater Deep, Daylight, Cloudy, Tungsten, Fluorescent
ISO: Auto, 100, 200, 400, 800, 1600 and 3200
Exposure Compensation: Exposure from -2.0 to +2.0 in 0.3 increments
Delay Timer: Off, 2 sec and 10 sec
LCD: 2.0” TFT LCD color display 230K resolution (240 * RGB * 320)
Memory: Micro SDHC/SDXC memory card up to 128GB (Sold separately). Important: Use Video Speed Class V30 (U3).
Read/write speed: 10MB/s
PC: Windows XP / 7 and up
MAC: OS 10.8 and up
1x USB 2.0 out (for charging battery and downloading to computer)
1x Micro HDMI out (for direct connection to HDTV)
Battery: Removable Li-ion battery (900 mAh / 3.8V / 3.42Wh)
Still images: 2+ hours (Approx. 500+ images)
Video: 1.5 hours at 1080p and 1.2+ hours at 4K
WiFi range: 100ft (33m) on land.
Waterproof: Individually depth tested to 130’ (60 m)
Shockproof: 3ft / 1m
Buoyancy: Negative; -17 grams underwater
Land: 0°F to 120°F (-18°C to 50°C)
Underwater: +33°F to +110°F(.5 °C to 44°C)
Storage temp: -20°F to +140°F(-29°C to +60°C)
Tripod mount: Standard ¼-20 tripod threads
Weight: 7.1 ounces (202 grams) UW housing w/ inner camera and battery.
Dimensions (LxWxH): UW Housing: 1.9” x 4.1” x 2.6” (4.9cm x 10.5cm x 2.6cm)
Inner camera: 1.3” x 2.3” x 1.6” (3.3cm x 5.8cm x 4.1cm)
Body Material: Anodized aluminum light head with fiber-reinforced polycarbonate body
Light Source/Bulb Type: 1 x COB LED array (CREE CXA1816 P4 36V)
Brightness: 2000 lumens (maintains 2000 lumens throughout burn time at full power)
Brightness Control/Light Modes: Full power (100%), half power (50%), quarter Power (25%)
Color Temperature: 5000K
Color Rendering Index: 80
Beam Angle: 120° on land / 90° underwater
Battery: Lithium Ion 7.4V, 3400 mAh, 25Wh (included)
Battery Charge Time: 170 minutes
Run Time: 60 minutes at full power, 120 min at half power or Auto, 240 min at quarter power
Depth: Tested to 330 feet/100 meters
8.5″ x 9.5″ x 2.3″ (22cm x 24cm x 6cm), fully assembled with light head, battery, grip and tray
5.1″ x 2.2″ x 4.1″ (13cm x 5.6cm x 10.4cm), head only
Weight: 13 ounces (370 grams) light head w/battery installed
Bulb Life: 35,000 hours
O-ring: Dual silicone O-rings (lube included)
Buoyancy: Negative; -94 grams underwater
*CRI is a measure of a light source’s ability to show object colors “realistically” or “naturally” compared to daylight, which has a CRI of 100 and represents the maximum value.
The beam angles for the Sea Dragon lights are shown as the true, tested “in-air” (above water) beam angle. Underwater, due to light refraction, the angle tightens to approximately 33% less.
Avoid using this Sea Dragon light above water for prolonged periods of time. The light is designed for underwater use and water is needed to displace heat. The metal light head at full power will reach temperature of about 140F (60C) degrees within a few minutes, which may cause burning if touched. A thermal sensor will automatically dim the light if internal temperatures reaches 150F (65C) degrees. Immediately turn off light if any parts of the light become hot to the touch.
ReefMaster RM-4K inner camera
ReefMaster underwater camera housing
Battery for ReefMaster RM-4K camera
USB cable 30”/75cm (USB-A to micro-B)
Moisture Muncher 1-capsule sampler
Sea Dragon 2000F UW Photo-Video Light Head
Flex-Connect Micro Tray
Flex Connect Grip
Sea Dragon 25Wh Lithium Ion rechargeable battery
AC Power Adapter
Int’l plug adapters
O-ring removal tool
Adapter for GoPro Cameras