Sony
Alpha a7 III Mirrorless Digital Camera (Body Only) 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 gapless on-chip lens design and an anti-reflection coating, as well as
eliminating the optical low-pass filter, 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.