Panasonic Lumix DMC-GH4

The Panasonic Lumix DMC-GH4 is a Micro Four Thirds System digital still and video camera originally released in May 2014.[1] At the time of its release, the GH4 was notable for being the world's first Mirrorless interchangeable-lens camera with 4K Video recording capability.

Panasonic Lumix DMC-GH4
Overview
TypeMicro Four Thirds system
Lens
LensMicro Four Thirds system mount
Sensor/medium
Sensor4/3 type MOS ('Live MOS sensor')
Image sensor size17.3 x 13.0 mm (in 4:3 aspect ratio)
Maximum resolution4608 x 3456 (16 megapixels)
ASA/ISO rangeISO 200–25600, extendable to 100
StorageSD /SDHC / SDXC
Focusing
Focus modesAF Single, AF Flexible, AF Continuous, Manual focus
Exposure/metering
Exposure modesProgram AE, Aperture priority, Shutter priority, Manual
Metering modesMultiple, Center weighted, Spot
Flash
Flashbuilt-in pop-up flash
Flash bracketing±3EV EV in ⅓ EV steps
Shutter
ShutterFocal-plane shutter / Electronic shutter
Shutter speed range1/16,000 – 60 s, bulb (max. 60 minutes)
Continuous shooting12 frames/s (mechanical shutter), 40 frames/s (electronic shutter)
Viewfinder
ViewfinderOLED Live View Finder (2,359K dots)
Image processing
Custom WBAuto, Daylight, Cloudy, Shade, Incandescent, Flash, White Set 1/2/3/4, Color temperature setting
General
Video/movie recordingAVCHD / MP4 / MOV,
4096×2160 (24p),
3840×2160 (24p, 25p, 30p),
1920×1080 (24p, 25p, 30p, 50p, 60p),
1280×720 (24p, 25p, 30p),
640×480 (25p, 30p)
Rear LCD monitorfree-angle 3 inch (3:2 aspect ratio), 1036K dots
Battery1860 mAh 7.2v lithium-ion battery pack
Dimensions132.9 mm × 93.4 mm × 83.9 mm (5.23 × 3.68 × 3.3 inches)
WeightApprox. 560 g (20 oz) (camera body with battery and SD card)

Features

The GH4 is largely physically similar to its predecessor, the Panasonic Lumix DMC-GH3, adding only a locking mode dial and more detailed rear LCD screen and Electronic Viewfinder.

The emphasis of the camera is the video with Venus Engine IX processor allow for 4K video and 12 fps continuous shooting. As a 4K video camera, it can be categorized as a pro-level video camera that can record in Cinema 4K mode (4096 x 2160) or standard 4K-UHD (3840 x 2160) using IPB compression in 100Mbit/s. In Full 1080p HD there are two options, 200Mbit/s in ALL-Intra compression, or 100Mbit/s with no recording time limit. The camera also provides .mov, mp4, AVCHD Progressive, and AVCHD video formats at a variety of frame rates according to the usage; and options for VFR (Variable Frame Rate) or Time Lapse/Stop Motion Animation without the need for post-production processing.

Autofocus needs only 0.07 seconds with the 'Depth from Defocus' autofocus system. The camera also has Wi-Fi with NFC, PC sync port, highlight and shadow control, and a 'silent mode' which uses the electronic shutter only. Video features added to the DMC-GH4 include Focus peaking, zebra overlay, luminance level adjustment, and cinema gamma presets.

DMW-YAGH Interface

Along with the GH4, Panasonic also released the YAGH interface unit, a camera-attached device to increase input and output options for the GH4. The YAGH connects to the GH4 via attachment screw on the bottom of the camera, as well as a sliding mechanism which plugs into the camera's HDMI port on the side. The interface contains two 3-pin XLR Connector inputs, which are controlled by a pair of preamplifiers inside the unit, offering phantom power, more control over input gain levels and microphone choice, and input metering via LED meters on the interface. The YAGH also provides a timecode input for multi-device synchronization.

For outputs, the YAGH offers four BNC connector terminals for Serial Digital Interface use with outboard recorders and monitors. In addition, a full-size HDMI port is also present. These video outputs differ from the camera's native recording in that they offer a 10-bit 4:2:2 signal rather than the camera's internal 8-bit 4:2:0.

The YAGH interface is not powered by the camera, instead relying on 12-volt DC power provided by a separate battery or power supply using a four-pin XLR type connector.

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References
  1. "Panasonic Announces Pricing & Availability for the LUMIX GH4 DSLM with 4K Video Recording Capabilities". shop.panasonic.com. Retrieved 2016-03-03.
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