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The Sony a7 III is a versatile camera with an improved sensor design that makes it appropriate for photo and video applications in a range of professional settings. New 24.2MP Exmor R BSI CMOS sensor and BIONZ X processor benefit image quality, video capabilities, and AF performance. They have been optimised for speed and low-light performance. Along with a redesigned touchscreen LCD, an enhanced EVF, a bigger battery, and two memory card slots, the a7 III also features an updated body design
The full-frame 24.2-megapixel Exmor R CMOS sensor, which has a back-illuminated design, works with the BIONZ X image engine to provide high-resolution stills and video while reducing noise and enhancing speed. For the creation of 14-bit, high-resolution stills with a native sensitivity range from ISO 100-51200, which can be subsequently enhanced to ISO 50-204800, the BSI design also significantly enhances data transfer speed. Additionally, it offers full-frame full-HD 4K internal video recording with a wide dynamic range. In order to achieve faster processing times and the capacity to capture an astounding 15-stop dynamic range at low sensitivity values, the BIONZ X processor additionally collaborates with a high-speed front-end LSI.
When using either a mechanical shutter or an electronic shutter, the sensor and processor combination also allows for quick continuous shooting at up to 10 fps at full resolution, for up to 177 consecutive frames, and with full-time AF/AE. A continuous shooting rate of up to 8 fps is also feasible when shooting in live view mode.
Full pixel readout is also feasible for higher quality imagery with less moiré and aliasing. Internal recording of UHD 4K movies is possible in several frame rates up to 30 fps and uses 2.4x oversampling, which renders greater detail. The 100 Mb/s XAVC S format, which is wrapped in an MP4 file with 4:2:0 sampling, is used for both 4K and FHD resolutions. Full HD 1080p recording is also supported at frame rates up to 120 fps.
With the frame rate set to either 30p or 24p, the high-speed, 120 fps recording also allows for 4x and 5x slow-motion movie recording. Uncompressed HDMI output permits the use of an optional external recorder for clear 4K recording with 4:2:2 sampling in addition to high-resolution internal recording.
The a7 III offers consumers a wide range of configurable colour and gamma parameters, allowing them to change the gamma, black level, knee, colour level, and more. For greater post-production versatility, shooters can use the S-Log2 Gamma Curve found on high-end Sony Cinema cameras, which can cram up to 1300% more dynamic range into the video output than conventional REC709.
In addition to BT.2020 colour space and HLG (Hybrid Log-Gamma) support, S-Log2 and S-Log3 are also supported, allowing for the production of an effective 14-stop dynamic range with improved grading flexibility in the shadow to mid-tone areas of the image.
Fast Hybrid AF System
For dependable and speedy autofocus and subject tracking performance, an upgraded 4D FOCUS system now uses a combination of 693 phase-detection points, which account for around 93% of the frame, and 425 contrast-detection regions. In comparison to earlier a7 models, its Fast Hybrid AF System now delivers twice the focusing speed, more stable tracking, and enhanced low-light focusing.
The powerful a7 III is equipped with a 5-stop effective 5-axis SteadyShot INSIDE image stabilisation system that corrects for five different types of camera shake that can occur when taking still photos and videos with a handheld camera. This makes it possible for users to utilise any lens—even modified lenses—confidently for important imagery without worrying about blur from camera shake.
The technology will make pitch and yaw corrections for long focal lengths. On the other hand, the incorporation of horizontal and vertical shift compensation will be advantageous for macro and high-magnification pictures. The roll compensation will be useful for all shooting techniques. Even when utilised with third-party lenses and adapters or lenses with built-in optical stabilisation, all 5 axes of stabilisation will always be in operation.
