Sony Alpha a7 III Full Frame Mirrorless Camera

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Sony Alpha a7 III Full Frame Mirrorless Camera

Distinguished by its updated sensor design, the Alpha a7 III Mirrorless Digital Camera from Sony is a well-rounded camera suitable for both photo and video applications in a variety of working situations. Refined for improved speed and low-light performance, the full-frame 24.2MP Exmor R BSI CMOS sensor and BIONZ X image processor pair to realize an impressive 10 fps continuous shooting rate and improved autofocus performance for faster, more reliable subject tracking along with wide frame coverage. This updated Fast Hybrid AF System employs a combination of 693 phase-detection points and 425 contrast-detection areas for quicker acquirement of focus in a variety of lighting conditions, and also maintains focus on subjects more effectively. In addition to speed and AF, the processing improvements also help to realize greater image clarity and reduced noise throughout the sensitivity range from ISO 100-51200, which can further be expanded to ISO 50-204800. Video recording capabilities have also been extended for enhanced quality when recording UHD 4K video with the full width of the full-frame sensor to minimize moiré and aliasing. Additionally, benefitting both stills and video operation, the a7 III utilizes a 5-axis SteadyShot INSIDE sensor-shift image stabilization, which is now effective to minimize the appearance of camera shake by up to 5 stops.

Beyond just updates to the imaging system, the a7 III's body design has also been revised to include a rear 3.0" 922k-dot touchscreen LCD, which has a tilting design to better support working from high and low angles. A 2.36m-dot Tru-Finder OLED EVF is also featured for bright and clear eye-level monitoring. For greater shooting flexibility, dual SD memory card slots are now featured, and a larger NP-FZ100 battery is also employed to achieve up to approximately 710 shots per charge. Suiting the camera's use in trying conditions, the magnesium-alloy chassis and weather-sealing also render the a7 III dust- and moisture-resistant.

24.2MP Exmor R BSI CMOS Sensor and BIONZ X Image Processor

Featuring a back-illuminated design, the full-frame 24.2-megapixel Exmor R CMOS sensor works with the BIONZ X image processor to offer high-resolution stills and video while minimizing noise and improving speed. This sensor structure works with a gapless on-chip lens design and an anti-reflection coating to improve light collection and enhance detail. Also, the copper wiring layer dramatically improves data transmission speed for creating 14-bit, high-resolution stills with a native sensitivity range from ISO 100-51200, which can be further expanded to ISO 50-204800. Also, it enables internal UHD 4K video recording with a wide dynamic range using the full width of the full-frame sensor. The BIONZ X processor also works in conjunction with a high-speed front-end LSI to realize faster processing times along with the ability to capture an impressive 15-stop dynamic range at low sensitivity values.

The sensor and processor combination also avails fast continuous shooting at up to 10 fps at full resolution, for up to 177 consecutive frames, and with full-time AF/AE when working with either a mechanical shutter or an electronic shutter. If shooting in live view mode, a continuous shooting rate of up to 8 fps is also possible.

Fast Hybrid AF System

An evolved 4D FOCUS system now employs a combination of 693 phase-detection points, which cover approximately 93% of the frame, along with 425 contrast-detection areas for reliable and quick autofocus and subject tracking performance. This Fast Hybrid AF System now achieves twice the focusing speed and more reliable tracking compared to previous a7 models, as well as improved low-light focusing. The use of phase-detection points also enables the use of A-mount lenses via the optional LA-EA3 or LA-EA1 lens mount adapters with full continuous AF/AE tracking compatibility.

The apt focus system also lends itself to a variety of focusing functions for refined accuracy, including Lock-on AF, which maintains focus on moving subjects throughout the use of a configurable frame that is set over the desired moving subject, and Expand Flexible Spot, which employs neighboring focus points to retain focus on moving subjects even if the originally selected point loses focus. Additionally, Eye AF can be used to base focus on recognized subjects' eyes for portraits and is available in both AF-S and AF-C modes. Autofocus can also be used in conjunction with the Focus Magnifier function for critical focus when homing in on minute subject details. The rear touchscreen can also be used for Touch Focus control, and a Touchpad Focus Control mode lets you use the rear screen intuitively while keeping your eye to the viewfinder.

5-Axis SteadyShot INSIDE Image Stabilization

Packed into the robust a7 III is a 5-stop effective 5-axis SteadyShot INSIDE image stabilization system that compensates for five different types of camera shake encountered during handheld shooting of stills and video. This allows users to confidently use any lens, even adapted lenses, for critical imaging without encountering blur from camera shake.

For long focal lengths, the system will correct for pitch and yaw adjustments. Macro and high-magnification imagery, on the other hand, will benefit from the inclusion of horizontal and vertical shift compensation. All shooting styles will get usage out of the roll compensation. All 5 axes of stabilization will function at all times, even when used with third-party lenses and adapters or lenses with built-in optical stabilization.

UHD 4K Video Recording in XAVC S Format

Internal recording of UHD 4K movies is possible in multiple frame rates up to 30 fps and using 2.4x oversampling renders greater detail and full pixel readout is possible, that is void of pixel binning, for higher quality imagery with reduced moiré and aliasing. Full-frame 4K recording has also been dramatically improved for improved quality when working at mid to high sensitivities to permit full use of the entire sensor width. Full HD 1080p recording is also supported in frame rates up to 120 fps, and both resolutions utilize the 100 Mb/s XAVC S format contained within an MP4 wrapper with 4:2:0 sampling. The high-speed, 120 fps recording also enables 4x and 5x slow-motion movie recording with the frame rate set to either 30p or 24p. In addition to high-resolution internal recording, uncompressed HDMI output also enables the use of an optional external recorder for clean 4K recording with 4:2:2 sampling.

Affording extensive customizable color and gamma controls, the a7 III allows users to adjust the gamma, black level, knee, color level, and more. Also, users can use the same S-Log2 Gamma Curve that is found on high end Sony Cinema cameras that squeezes up to 1300% more dynamic range into the video signal then traditional REC709, for increased post-production flexibility. HLG (Hybrid Log-Gamma) support is also available, along with the BT.2020 color space, for recording within a wide color gamut and, in addition to S-Log2, S-Log3 is also available for producing an effective 14-stop dynamic range with increased grading control in the shadow to mid-tone regions of the image.

Body Design and Built-In Wi-Fi/Bluetooth

  • An XGA OLED Tru-Finder EVF is featured, and has a 2.36m-dot resolution and 0.78x magnification for bright, clear viewing in high detail. This viewfinder design also affords the use of autofocus in the Focus Magnifier mode as well as improved focusing peaking to benefit manual focus operation.

  • In addition to the EVF, a 3.0" 922k-dot rear LCD is also available, which has a touch panel design for intuitive operation and focusing control. The screen also tilts upward 107° and downward 41° to benefit working from high and low angles.

  • Magnesium-alloy chassis assures rigidity, durability, and stability while remaining lightweight. The lens mount has also been improved to better support heavy lenses and the grip rigidity has been improved for more comfortable hand-holding.

  • Weather-sealing has been employed to resist dust and moisture for reliable operation in harsh weather conditions.

  • Using the NP-FZ100 battery, the a7 III has improved battery life and is now rated for approximately 710 shots per charge.

  • Dual SD memory card slots allow for flexible file saving and handling, and can be configured to partition raw and JPEG files or can be used for overflow recording. One of the card slots is rated to support UHS-II memory cards.

  • A USB 3.0 Type-C port has been added, in addition to a micro-USB port, for faster, more reliable tethering support. The USB Type-C connection allows the camera to be charged from the host power source while connected.

  • Built-in Wi-Fi enables the a7 III to instantly share imagery to mobile devices for direct sharing online to social networking, via email, and to cloud storage sites. NFC (Near Field Communication) is also supported, which allows for one-touch connection between the camera and compatible mobile devices; no complex set-up is required. Once connected, the linked mobile device can also display a live view image on its screen and remotely control the camera's shutter.

  • Bluetooth connectivity allows for location data acquisition.

Other Camera Features

  • A Ratings function lets you assign star values, from 1-5, to images in-camera for faster editing and sorting at home during post-production.

  • An advanced 1200-zone evaluative exposure metering sensor delivers consistent and accurate results using multi-segment, center-weighted, or spot metering modes.

  • Highlight and Average metering modes helps avoid blown-out highlights and provide stable auto-exposure, respectively.

  • Anti-flicker shooting automatically recognizes and times the shutter action to minimize the flicker effect for more consistent results on still images.

  • Picture Effect modes: Posterization (Color), Posterization (B/W), Pop Color, Retro Photo, Partial Color (R/G/B/Y), High Contrast Monochrome, Toy Camera (Normal/Cool/Warm/Green/Magenta), and Soft High-Key.

  • Creative Style modes: Standard, Vivid, Neutral, Clear, Deep, Light, Portrait, Landscape, Sunset, Night Scene, Autumn leaves, Black & White, Sepia, Style Box (1-6), (Contrast (-3 to +3 steps), Saturation (-3 to +3 steps), Sharpness (-3 to +3 steps).

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Specifications
Price
MSRP $2000
Body type
Body type SLR-style mirrorless
Sensor
Max resolution 6000 x 4000
Other resolutions 6000 x 3376, 3936 x 2624, 3936 x 2216, 3008 x 1688, 3008 x 2000
Image ratio w:h 3:2, 16:9
Effective pixels 24 megapixels
Sensor photo detectors 25 megapixels
Sensor size Full frame (35.8 x 23.8 mm)
Sensor type BSI-CMOS
Processor Bionz X
Image
ISO Auto, 100-51200
Boosted ISO (minimum) 50
Boosted ISO (maximum) 204800
White balance presets 11
Custom white balance Yes
Image stabilization Sensor-shift
CIPA image stabilization rating 5 stop(s)
Uncompressed format RAW
JPEG quality levels Extra fine, fine, standard
Optics & Focus
Autofocus
  • Contrast Detect (sensor)
  • Phase Detect
  • Multi-area
  • Center
  • Selective single-point
  • Tracking
  • Single
  • Continuous
  • Touch
  • Face Detection
  • Live View
Digital zoom Yes (4)
Manual focus Yes
Number of focus points 693
Lens mount Sony E
Focal length multiplier 1×
Screen / viewfinder
Articulated LCD Tilting
Screen size 3
Screen dots 921,600
Touch screen Yes
Live view Yes
Viewfinder type Electronic
Viewfinder coverage 100%
Viewfinder magnification 0.78×
Viewfinder resolution 2,359,296
Photography features
Minimum shutter speed 30 sec
Maximum shutter speed 1/8000 sec
Aperture priority Yes
Shutter priority Yes
Manual exposure mode Yes
Subject / scene modes Yes
Built-in flash No
External flash Yes (via Multi Interface shoe)
Continuous drive 10.0 fps
Self-timer Yes (2 or 10 sec; continuous (3 or 5 exposures))
Metering modes
  • Multi
  • Center-weighted
  • Highlight-weighted
  • Average
  • Spot
Exposure compensation ±5 (at 1/3 EV, 1/2 EV steps)
AE Bracketing ±5 (3, 5 frames at 1/3 EV, 1/2 EV, 2/3 EV, 1 EV, 2 EV steps)
WB Bracketing Yes
Videography features
Resolutions 3840 x 2160 (30p, 24p) 1920 x 1080 (120p, 60p, 60i, 24p), 1440 x 1080 (30p), 640 x 480 (30p)
Format MPEG-4, AVCHD, XAVC S, H.264
Videography notes Supports XAVC S codec (100Mbps), S-Log2 and S-Log3, and HLG
Modes
  • 3840 x 2160 @ 30p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM
  • 3840 x 2160 @ 24p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM
  • 3840 x 2160 @ 30p / 60 Mbps, XAVC S, MP4, H.264, Linear PCM
  • 3840 x 2160 @ 24p / 60 Mbps, XAVC S, MP4, H.264, Linear PCM
  • 1920 x 1080 @ 120p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM
  • 1920 x 1080 @ 120p / 60 Mbps, XAVC S, MP4, H.264, Linear PCM
  • 1920 x 1080 @ 60p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM
  • 1920 x 1080 @ 30p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM
  • 1920 x 1080 @ 24p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM
  • 1920 x 1080 @ 60p / 25 Mbps, XAVC S, MP4, H.264, Linear PCM
  • 1920 x 1080 @ 30p / 16 Mbps, XAVC S, MP4, H.264, Linear PCM
  • 1920 x 1080 @ 60i / 24 Mbps, AVCHD, MTS, H.264, Linear PCM
  • 1920 x 1080 @ 60i / 17 Mbps, AVCHD, MTS, H.264, Linear PCM
Microphone Stereo
Speaker Mono
Storage
Storage types SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
Connectivity
USB USB 3.1 Gen 1 (5 GBit/sec)
HDMI Yes (micro-HDMI port with 4K still, uncompressed video output)
Microphone port Yes
Headphone port Yes
Wireless Built-In
Wireless notes with NFC and wireless control via PlayMemories Mobile app
Remote control Yes (wired)
Physical
Environmentally sealed Yes
Battery Battery Pack
Battery description NP-FZ100 lithium-ion battery and charger
Battery Life (CIPA) 710
Weight (inc. batteries) 650 g (1.43 lb / 22.93 oz)
Dimensions 127 x 96 x 74 mm (5 x 3.78 x 2.91)
Other features
Orientation sensor Yes
Timelapse recording No
GPS None

Accessories

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Sony Alpha a7 III • Announced Feb 27, 2018 • 24 megapixels • 3″ screen • Full frame sensor $1,998.00 - $4,196.00 Check Prices

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