Sony a7R IIIA Overview

Announced Apr 7, 2021 •
42 megapixels | 3 screen | Full frame sensor
Product description
Announced Apr 7, 2021

The Sony a7R IIIA is a full-frame mirrorless camera that uses a 42.4MP stabilized BSI CMOS sensor. The Mark IIIA has numerous improvements over its predecessor, many of which are borrowed from the flagship a9. Faster processing and a redesigned shutter allow for 10 fps bursts (or 8 fps with no viewfinder blackout), and a refined autofocus system promises better subject tracking performance. The design hasn't changed much, with the main additions being a higher resolution EVF, joystick for adjusting the focus point, dual SD card slots and a higher capacity battery. Video can be captured at UHD 4K (30p) using the full-width of the sensor or a Super 35 crop, and 1080/120p option is also available. The a7R III supports S-Log3 and Hybrid Log Gamma profiles, among others.

The "A" variant is the same as the original a7R III, except for the higher-resolution (2.36M-dot) LCD.

Quick specs
Body type SLR-style mirrorless
Max resolution 7952 x 5304
Effective pixels 42 megapixels
Sensor size Full frame (35.9 x 24 mm)
Sensor type BSI-CMOS
ISO Auto, 100-32000 (expands to 50-102400)
Lens mount Sony E
Focal length mult. 1×
Articulated LCD Tilting
Screen size 3
Screen dots 2,360,000
Max shutter speed 1/8000 sec
Format MPEG-4, AVCHD, XAVC S
Storage types Two SD/SDHC/SDXC slots (UHS-II support on one)
USB USB 3.2 Gen 1 (5 GBit/sec)
Weight (inc. batteries) 657 g (1.45 lb / 23.17 oz)
Dimensions 127 x 96 x 74 mm (5 x 3.78 x 2.91)
GPS None

See full specifications