Panasonic has announced a new addition to the company’s Lumix GH series, the
Lumix DMC-GH4,
a hybrid DSLM camera that adds substantial features to an already
competent platform. Although still photography has not taken a back seat
to the video functionality, it is in the latter area that the majority
of the advancements have been made, primarily in the ability to capture
footage in 4K resolution. Available to anyone, but positioned for the
advanced amateur, indie, and professional photographer and filmmaker,
the camera’s 17.02 megapixel (16.05 effective) Live MOS Micro Four
Thirds sensor is supported by the Venus Engine image processor running
on a quad-core CPU. This combination delivers approximately 50% higher
speed signal readout, which aids in suppressing rolling shutter
artifacts when using the electronic shutter or recording video. And for
professional photo performance, moiré suppression has been improved,
along with superior noise reduction that allows for exposures of up to
sixty minutes.

The camera features the same durable magnesium-alloy body used by its
predecessor, and when combined with suitable lenses, delivers a splash-
and dust-proof package. The high-performance shutter is rated for
200,000 release times with a maximum speed of 1/8000 of a second. A
silent mode switches the shutter from mechanical to electronic
operation, turns off any sounds, and suppresses the AF assist lamp and
flash for situations where working in a discreet manner is required.
Contrast Auto Focus with 49-area focusing enables the camera to lock on
to a subject in approximately 0.07 seconds when paired with certain
Panasonic lenses. Burst speeds in AFS mode have been boosted to 12 fps
using the mechanical shutter, and up to 40 fps with the electronic
shutter. Sensitivity has also been improved with a maximum ISO 25600,
along with gradation performance, resolution, and color reproduction.
Images can be captured in RAW or JPEG or a combination of both, and
various photo styles can be added, with multiple parameters in each mode
that can be adjusted or set into the camera’s memory.

Video recording is available in Cinema 4K (4096 x 2160, 24 fps) and
QFHD 4K (3840 x 216, up to 30 fps) in MOV/MP4 formats. Full HD video can
be captured with 200Mbps ALL-Intra or 100Mbps IPB, with no limit on
recording time, and users can choose from MOV, MP4, AVCHD Progressive,
and AVCHD formats at a variety of frame rates, according to their needs.
In MP4/MOV, sound is recorded as LPCM (Linear Pulse Code Modulation)
audio files. Real-time 4:2:2/8-bit output to an external monitor is
available using an optional micro HDMI cable. In this instance, video is
simultaneously recorded in 4:2:0/8-bit to the internal cards.
4:2:2/10-bit output is also available but simultaneous recording is not
possible in this scenario. Users can choose to output only the recorded
content or the content with the setting menus displayed. Variable Frame
Rates (VFR) enable Full HD to be recorded with slow or fast motion (up
to 96 fps) and time lapse/stop-motion animation can also be achieved
without resorting to post production.
A slew of features for professional video production are available.
SMPTE compliant Timecode in “Rec Run” or “Free Run” makes it easy to
synchronize multiple videos or sound sources in post production. Color
Bars (SMPTE/EBU/ARIB Standard) are used for fixing color or brightness
to broadcast specifications and a 1kHz Test Tone can be used for setting
appropriate audio levels. Synchro Scan helps suppress flicker over the
TV or PC monitor, or when shooting under fluorescent lights, and a
Center Marker works as a guide mark for image composition. “CINELIKE D”
and “CINELIKE V” gamma settings create a cinema-like tone for expanded
creativity, and use of the Master Pedestal allows for adjusting the
brightness balance +/-15 steps based on the color black. A Zebra Pattern
function displays overexposed areas before or during shooting with the
pattern available for output to an external monitor. Focus Peaking
displays accurate focus in MF and AF+MF modes. Users can monitor the
focus peak in live view or via remote photo/ video shooting with a
smartphone or a tablet using Wi-Fi.

And speaking of Wi-Fi, the GH4 integrates IEEE 802.11 b/g/n
connectivity with Near Field Communication (NFC) technology to offer
more operational options, as well as instant image sharing. With the
company’s iOS and Android "Image App," remote shooting of both photo and
video is possible using a smartphone or tablet as the remote shutter
and monitor. In addition to releasing the shutter, control over zooming,
focusing, and settings of shutter speed, aperture, and exposure
compensation is available. It is also easy to embed geotags into the
image after shooting. For the smartphone or tablet without NFC, the
camera displays a dedicated QR code on its monitor for easy pairing.
In addition to the standard luminance level of 16-235 and 16-255, the
camera offers the full luminance range of 0-255 for the photographer
who is new to video. The Live View function is also advanced, making it
possible to adjust highlight and shadow separately, using the front and
rear dial. Three pattern settings can be customized in addition to the
three preset patterns. Aside from the conventional Face Recognition Auto
Focus (AF), newly incorporated Eye Detection AF automatically sets
focus on the eye of a human face. Custom Multi AF mode allows users to
freely select the blocks for focusing out of the total 49 points. 1-area
AF area can be seamlessly magnified not only in manual but also in
autofocus modes. Tracking AF has also been advanced in tracking accuracy
by estimating the subject’s movement. The focus point can be set on any
part of the 100% field of view and can be magnified either with a
manual focus ring or with the cursor key in MF Assist mode. In the Touch
Pad AF, the position can be set either on an absolute or relative
coordinate.

The GH4 features newly developed high-precision, high-speed dual
Organic Light-Emitting Diode (OLED) displays for the Live View Finder
(LVF) and the rear monitor. Increasing the resolution of the display
area to 2,359K dots, the 16:9 wide screen electronic viewfinder has
approximately 1.34x/0.67x (35mm camera equivalent) magnification, 100%
field of view, and an eye point of approximately 21mm. Notably, the OLED
for the LVF boasts 10,000:1 high contrast for superior color
reproduction. And with a newly designed large eyecup, the visibility of
the LVF is dramatically improved. Image output is automatically switched
between the LVF and the rear monitor with high, low, and off
sensitivity options to reduce false switching. The 3.0-inch 1,036K-dot
free-angle OLED rear monitor can be rotated 180° to the side and tilted
270° up and down and offers an approximately 100% field of view. It
features static touch control for smooth operation, either while
shooting or during playback. Both the LVF and rear monitor have a
high-speed response with minimum time lag, while enhancing the
resolution.
Three dials are available on the top and back of the camera and the
main dial now comes with a lock. A dedicated button allows direct access
to exposure compensation, white balance adjustment, or ISO setting, and
a maximum of five settings can be assigned to the “Fn” button. All
these external components are designed to be operated easily without
taking one's eye away from the viewfinder. A variety of terminals
provides flexible shooting options. A 3.5mm microphone jack is available
for audio recording using an external microphone, and the 3.5mm
headphone jack provides monitoring of the incoming audio while shooting
video. In addition to these, the camera has AV outputs (two-channel
audio, composite), a flash sync terminal, and 2.5mm jack for a remote
controller. The built-in and an external flash can be synchronized with a
maximum 1/250-second shutter speed.
While on the subject of connectivity, the company has developed the
DMW-YAGH interface unit that places the camera squarely in a
professional production environment. 3G-SDI video terminals that are
compliant with full HD (4:2:2/10-bit) offer four parallel outputs that
can also be used for 4K (4:2:2/10-bit) output, both with Timecode. Dual
XLR input terminals can accept either line or microphone levels, with
individually switchable 48V phantom power available for use with
condenser microphones. Volume levels can be controlled separately for
each channel, with the audio levels displayed via LED meters on the rear
of the unit. The 12V DC input is compliant with large-capacity
industrial batteries for continuously supplying the GH4 with power.
A total of twenty-two interchangeable LUMIX G digital lenses offers a
multitude of creative options, including HD lenses that allow for
silent, high performance AF control suitable for video recording.
Various expansion options are available including an external flash,
shotgun microphones, a battery grip, and more. Of course, as with all
Micro Four Thirds cameras, almost the entire world of manual lenses is
available for use on the GH4 with a suitable optional adapter. And last,
but not least, for the global business of professional users, the
system frequency can be selected between 59.94 (23.98), 50.00, or
24.00Hz.
The camera will be available as a
GH4 body only, or as a
kit with the DMW-YAGH unit, in addition to purchasing the
DMW-YAGH expansion unit separately.
| Imaging |
| Lens Mount |
Micro Four Thirds |
| Camera Format |
Micro Four Thirds (2x Crop Factor) |
| Pixels |
Actual: 17.2 Megapixel
Effective: 16.05 Megapixel |
| Max Resolution |
4608 x 3456 |
| Sensor Type / Size |
MOS, 17.3 x 30.0mm |
| File Formats |
Still Images: JPEG, MPO, RAW
Movies: MOV, MP4, MPEG-4 AVCHD
Audio: AAC, Dolby Digital 2ch, Linear PCM |
| Dust Reduction System |
Yes |
| Memory Card Type |
SD
SDHC
SDXC |
| AV Recording |
| Video Recording |
Yes, NTSC/PAL |
| Video Format |
High Definition MOV
4096 x 2160p / 24 fps (100Mbps)
3840 x 2160p / 23.98 fps (100Mbps)
3840 x 2160p / 24 fps (100Mbps)
3840 x 2160p / 25 fps (100Mbps)
3840 x 2160p / 29.97 fps (100Mbps)
1920 x 1080p / 23.98 fps (200Mbps)
1920 x 1080p / 24 fps (200Mbps)
1920 x 1080p / 25 fps (200Mbps)
1920 x 1080p / 29.97 fps (200Mbps)
1920 x 1080p / 50 fps (200Mbps)
1920 x 1080p / 59.94 fps (200Mbps) |
High Definition MP4
4096 x 2160p / 24 fps (100Mbps)
3840 x 2160p / 23.98 fps (100Mbps)
3840 x 2160p / 24 fps (100Mbps)
3840 x 2160p / 25 fps (100Mbps)
3840 x 2160p / 29.97 fps (100Mbps)
1920 x 1080p / 23.98 fps (200Mbps)
1920 x 1080p / 24 fps (200Mbps)
1920 x 1080p / 25 fps (200Mbps)
1920 x 1080p / 29.97 fps (200Mbps)
1920 x 1080p / 50 fps (200Mbps)
1920 x 1080p / 59.94 fps (200Mbps)
1920 x 1080p / 25 fps (20Mbps)
1920 x 1080p / 29.97 fps (20Mbps)
1920 x 1080p / 50 fps (28Mbps)
1920 x 1080p / 59.94 fps (28Mbps)
1280 x 720p / 25 fps (10Mbps)
1280 x 720p / 29.97 fps (10Mbps) |
Standard Definition MP4
640 x 480p / 25 fps (4Mbps)
640 x 480p / 29.97 fps (4Mbps)
High Definition AVCHD
1920 x 1080p / 23.98 fps (24Mbps)
1920 x 1080p / 50 fps (28Mbps)
1920 x 1080p / 59.94 fps (28Mbps)
1920 x 1080i / 50 fps (24Mbps)
1920 x 1080i / 50 fps (17Mbps)
1920 x 1080i / 59.94 fps (24Mbps)
1920 x 1080i / 59.94 fps (17Mbps) |
| Aspect Ratio |
4:3, 16:9 |
| Video Clip Length |
Up to 220 min. |
| Audio Recording |
With Video, Stereo |
| Focus Control |
| Focus Type |
Auto & Manual |
| Focus Mode |
Single-servo AF (S), Continuous-servo AF (C), Manual Focus (M), Flexible (AFF) |
| Viewfinder/Display |
| Viewfinder Type |
Electronic |
| Viewfinder Pixel Count |
2,359,000 |
| Viewfinder Eye Point |
21.0mm |
| Viewfinder Coverage |
100% |
| Viewfinder Magnification |
Approx. 1.34x |
| Diopter Adjustment |
- 4.0 to +4.0 m |
| Display Screen |
3" Touchscreen Swivel OLED (1,036,000) |
| Screen Coverage |
100% |
| Exposure Control |
| ISO Sensitivity |
160-25600 (Extended Mode: 100-25600) |
| Shutter |
60 - 1/8000 sec.
60 minute in Bulb Mode
1/24 - 1/16000 sec in Movie Mode |
| Remote Control |
DMW-RSL1 (Optional) |
| Metering Method |
Center-weighted average metering, Multiple, Spot metering |
| Exposure Modes |
Modes: Aperture Priority, Manual, Program, Shutter Priority
Metering Range: EV 0.0 - EV 18.0 |
| White Balance Modes |
Auto, Cloudy, Color Temperature, Daylight, Flash, Incandescent, Shade, White Set |
| Burst Rate |
Up to 40 fps |
| Flash |
| Flash Modes |
Auto
Auto/Red-eye Reduction
Forced On
Forced On/Red-eye Reduction
Off
Slow Sync
Slow Sync/Red-eye Reduction |
| Built-in Flash |
Yes |
| Max Sync Speed |
1 / 250 sec. |
| Flash Compensation |
-3 EV to +3 EV (in 1/3 EV steps) |
| Dedicated Flash System |
TTL |
| External Flash Connection |
Hot Shoe |
| Performance |
| Self Timer |
10 sec., 2 sec.
Number of Shots: 1-3 |
| Interval Recording |
Yes |
| Connectivity |
1/8" Headphone, 1/8" Microphone, AV Output, HDMI D (Micro), USB 2.0, Wired Remote Port |
| Wi-Fi Capable |
Yes |
| Included Software Requirements |
Windows: XP, Vista, 7, 8
Mac: OS X 10.5 or later |
| Power |
| Battery |
1x Rechargeable Lithium-Ion Battery Pack, 7.2VDC, 1860mAh |
| Operating/Storage Temperature |
32 to 104°F (0 to 40°C)
Humidity: 10 - 80% |
| Physical |
| Dimensions (WxHxD) |
5.2 x 3.7 x 3.3" / 132.9 x 93.4 x 83.9mm |
| Weight |
19.75 oz / 560 g with SD card and Battery |