The Mk 3 is a set of an ergonomic, easy-to-grip housing, specially designed for underwater use. Easy to hold and operate even with one hand, the rugged housing features a unique locking system: a "Pressure Lock" thumbscrew that allows for optimal pressure on the housing's O-ring seal. The waterproof housing encloses the small internal camera and also stores a powerful desiccant called the "Moisture Muncher" next to the camera, preventing internal fogging caused by heat and humidity trapped inside the housing.

With the ReefMaster RM-4K's expandable memory, you can use Micro SDHC memory cards up to 128GB, ensuring you have plenty of space to shoot and save all your video content. It also has a time lapse function: shoot at preset intervals and save as video files or a series of still images. For best results, especially when shooting 4K video, use Micro SDXC UHS-I Class 3 (U3) or Video Class 30 (V30) memory cards.

Lighting is easy—use the ReefMaster RM-4K with Sea Dragon underwater LED photo/video lights (or other LED light sources). There's no flash or cable to sync with an external strobe. Simply turn on the light and adjust the intensity based on your subject, conditions, and distance.

The compact RM-4K is easily expandable with popular SeaLife accessories, including one or two Sea Dragon photo/video/dive lights, and available 10x close-up or super macro lenses. Its 2.0" TFT color LCD screen creates a crisp, easily visible display on the small camera.

Characteristics

Panasonic® CMOS image sensor 14 megapixels for sharp, colorful images

4K Ultra HD video at 30 fps and 1080p HD video at 60 fps

Compact 40m/130ft Underwater Housing with removable internal camera

140° Fisheye Lens – Get close to your subject and fit everything into the image

Underwater color correction mode : Underwater Deep for diving and Underwater Shallow for snorkeling

Easy 4-button controls for easy use

Wi-Fi Preview, download and share photos/videos wirelessly to your smartphone or tablet with the "SeaLife ReefMaster" app (free download from the Google Play Store or Apple App Store)

Image stabilization : Electronic stabilization reduces vibrations and hand movement for smoother video recording

Expandable memory via micro SDHC/SDXC memory card up to 128 GB

Waterproof up to 130 feet / 40 m

Compact design for easy handling and light travel

Focus 12" (30cm) to infinity (optional accessory for 10X Macro Lens or Super Macro Lens)

Time lapse shot at set time intervals: save as video file or series of still images

Removable lithium-ion rechargeable battery : 900mAh / 3.8V / 3.42Wh for over 2 hours of video or over 500 images

2.0" 230K high resolution TFT color LCD

Expandable with the most popular SeaLife accessories (one or two Sea Dragon photo-video dive lights, close-up lens, Super Macro lens)

Sea Dragon 2000F Features

Powerful 2000 lumen LED light. Latest COB LED array technology. Real, lab-tested lumens, not the "theoretical" lumens specified by most other manufacturers.
One button control for easy use. One button to turn the light on/off and select the brightness.
Three brightness levels 100%, 50% and 25%
Hidden emergency signal mode. 1-second flash interval and Morse code SOS. Press and hold the power button for 4 seconds to activate.
60 minutes of battery life at full power
Constant brightness: Regulated circuitry so that the light does not dim when running on battery power.
80 Color Rendering Index (CRI) that mimics natural daylight.
Easy to expand with Flex-Connect™ trays, handles, arms, cold shoe, ball joint and YS adapters.
Quick release button to detach the light and aim into crevices and hard-to-reach areas
The wide 120° beam angle evenly illuminates the subject without hot spots.
Depth tested up to 100m (330ft) - Guaranteed
Corrosion-resistant metal light head for heat dispersion and durability
Removable 25W lithium-ion battery with charger and international plug adapters included
Waterproof Battery Compartment: Even if the O-ring seal fails, the battery compartment is sealed so water cannot reach the internal electronics.

Specifications

Free App Name: ReefMaster in App & Play Store

Focal length: 2.5 mm (equivalent to 35 film = 14 mm)

Focus Type: instant fixed focus lens

Shutter response time: 0.30 seconds (AKA Shutter Lag)

Focus range: 12 inches to infinity (30 cm to infinity)

Field of view*: 140° diagonal fisheye wide-angle lens

Shutter speed: from 1/25 to 1/2000 of a second

Shooting modes: Single, Burst (3, 7, 15 or 30 photos at 1 photo/sec), Time Lapse Photo and Time Lapse Video

White Balance (WB): Auto, Shallow underwater, Deep underwater, Daylight, Cloudy, Tungsten, Fluorescent

ISO: Auto, 100, 200, 400, 800, 1600 and 3200

Exposure Compensation: exposure from -2.0 to +2.0 in increments of 0.3

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: 10 MB/s

PC Connection:
PC: Windows XP / 7 and later
MAC: OS 10.8 and later

Output ports:
1x USB 2.0 output (for charging the battery and discharging it to the computer)
1x Micro HDMI output (for direct connection to HDTV)

Drums: Removable lithium-ion battery (900 mAh / 3.8 V / 3.42 Wh)

Battery life:
Still images: 2+ hours (approx. 500+ images)
Video: 1.5 hours at 1080p and 1.2+ hours at 4K

Wi-Fi range: 100 feet (33 m) to the ground.

Waterproof: Individually tested at depths up to 130 feet (60 m)

Shockproof: 3 feet / 1 m

Buoyancy: Negative; -17 grams underwater

Operating temperature:
Ground: 0°F to 120°F (-18°C to 50°C)
Underwater: +33°F to +110°F (0.5°C to 44°C)

Storage temperature: -20°F to +140°F (-29°C to +60°C)

Tripod mount: thread standard ¼-20 for tripod

Weight: 7.1 ounces (202 grams) UW case with internal camera and battery.

Dimensions (LxWxH) : UW Housing: 1.9" x 4.1" x 2.6" (4.9 cm x 10.5 cm x 2.6 cm)
Internal camera: 1.3" x 2.3" x 1.6" (3.3 cm x 5.8 cm x 4.1 cm)

Sea Dragon 2000F Specifications

Brightness: 2000 lumens (maintains 2000 lumens throughout the burn time at full power)
Brightness control/light mode: 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, 3400mAh, 25Wh (included)
Battery charging time: 170 minutes
Runtime: 60 minutes at full power, 120 minutes at half power or Auto, 240 minutes at quarter power
Depth: Tested to 330 feet/100 meters
Dimensions:
8.5" x 9.5" x 2.3" (22cm x 24cm x 6cm).

What's included

ReefMaster RM-4K internal camera
ReefMaster Underwater Camera Housing
ReefMaster RM-4K Camera Battery
Wrist strap
USB cable 30"/75 cm (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
Charging tray
International plug adapters
Replacement O-ring
O-ring lubricant
O-ring removal tool
GoPro Camera Adapter