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.
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.
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.
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.
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.
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.
FE 28-70mm f/3.5-5.6 OSS Lens
Included with the camera is the versatile wide-angle to portrait-length FE 28-70mm f/3.5-5.6 OSS lens. This lens features one extra-low dispersion element and three aspherical elements to control both chromatic and spherical aberrations throughout the zoom range. A linear autofocus motor, coupled with an internal focusing design, offers quick and quiet focusing performance to suit both stills and video shooting. Additionally, Optical SteadyShot image stabilization minimizes the appearance of camera shake and a weather-sealed design permits working in inclement conditions.
Lens Mount Sony E-Mount
Camera Format Full-Frame
Actual: 25.3 Megapixel
Effective: 24.2 Megapixel
Max Resolution 24 MP: 6000 x 4000
Aspect Ratio 3:2, 16:9
Sensor Type / Size CMOS, 35.6 x 23.8 mm
Video Recording Yes, NTSC/PAL
3840 x 2160p at 23.98/25/29.97 fps (100 Mb/s XAVC S via H.264)
3840 x 2160p at 23.98/25/29.97 fps (60 Mb/s XAVC S via H.264)
1920 x 1080p at 100/120 fps (100 Mb/s XAVC S via H.264)
1920 x 1080p at 100/120 fps (60 Mb/s XAVC S via H.264)
1920 x 1080p at 23.98/25/29.97/50/59.94 fps (50 Mb/s XAVC S via H.264)
1920 x 1080p at 50/59.94 fps (25 Mb/s XAVC S via H.264)
1920 x 1080p at 25/29.97 fps (16 Mb/s XAVC S via H.264)
1920 x 1080i at 50/59.94 fps (24 Mb/s AVCHD via H.264)
1920 x 1080i at 50/59.94 fps (17 Mb/s AVCHD via H.264)
Aspect Ratio 16:9
Video Clip Length Up to 29 Min
Audio Recording Built-In Mic: With Video (Stereo)
Optional External Mic: With Video (Stereo)
Focus Type Autofocus
Focus Mode Automatic (A), Continuous-Servo AF (C), Direct Manual Focus (DMF), Manual Focus (M), Single-servo AF (S)
Autofocus Points Phase Detection: 693
Contrast Detection: 425
Viewfinder Type Electronic
Viewfinder Size 0.5"
Viewfinder Pixel Count 2,359,000
Viewfinder Eye Point 23.00 mm
Viewfinder Coverage 100%
Viewfinder Magnification Approx. 0.78x
Diopter Adjustment -4 to +3 m
Display Screen 3" Rear Touchscreen Tilting LCD (921,600)
Screen Coverage 100%
Dimensions (W x H x D) 5.0 x 3.8 x 2.9" / 126.9 x 95.6 x 73.7 mm
Weight 1.43 lb / 650 g
Focal Length 28 - 70mm
Aperture Maximum: f/3.5 - 5.6
Minimum: f/22 - 36
Angle of View 75° - 34°
Minimum Focus Distance 11.81" (30 cm)
Maximum Reproduction Ratio 1:5.26
Optical Design 9 Elements in 8 Groups
Diaphragm Blades 7, Rounded
Image Stabilization Yes
Filter Thread Front: 55 mm
Dimensions (DxL) Approx. 2.85 x 3.27" (72.5 x 83 mm)
Weight 10.41 oz (295 g)
Sony Alpha a7 III Mirrorless Digital Camera with 28-70mm Lens
FE 28-70mm f/3.5-5.6 OSS Lens
NP-FZ100 Rechargeable Lithium-Ion Battery (2280mAh)
ALC-B1EM Body Cap for E-Mount Cameras
Accessory Shoe Cap
Standard Manufacturer's Warranty