The Sony a7R Mark III is a full-frame mirrorless camera that uses a 42.4MP stabilized BSI CMOS sensor. The Mark III 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.
An updated Quad-VGA OLED Tru-Finder EVF is featured, and has a 3.69m-dot resolution for bright, clear viewing in high detail. Both Standard and High quality settings can be used, depending on the shooting situation, in order to optimize the viewing experience. This updated 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″ 1.44m-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.
A durable shutter unit incorporates a coreless motor and brake system that reduces vibrations to better control shutter shock as well as extend its rated lifespan to approximately 500,000 actuations.
Weather-sealing has been employed to resist dust and moisture for reliable operation in harsh weather conditions. Using the same NP-FZ100 battery as the a9, the a7R III has improved battery life and is now rated for approximately 530 shots per charge with the EVF or 650 shots with the rear LCD.
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.
Manuals
