|Effective Pixels||42 megapixels|
|Sensor Size||Full frame (35.9 x 24 mm)|
|Max resolution||7952 x 5304|
|ISO||Auto, 100-32000 (expands to 50-102400)|
|White balance presets||10|
|Custom white balance||Yes|
|Image stabilization notes||5-axis|
|JPEG quality levels||Extra fine, fine, standard|
|Lens and Focus|
|Focal length (equiv.)||1×|
|Number of focus points||399|
|Lens mount||Sony E|
|Screen type||TFT LCD|
|Minimum shutter speed||30 sec|
|Maximum shutter speed||1/8000 sec|
|External flash||Yes (via hot shoe or flash sync port)|
|Flash modes||Off, Auto, Fill-flash, Slow Sync, Rear Sync, Red-eye reduction, Wireless, Hi-speed sync|
|Continuous Shooting||10.0 fps|
|Exposure compensation||±5 (at 1/3 EV, 1/2 EV steps)|
|AE Bracketing||±5 (3, 5 frames at 1/3 EV, 1/2 EV, 2/3 EV, 1 EV, 2 EV steps)|
|Video Format||MPEG-4, AVCHD, XAVC S|
|Storage and Connectivity|
|Storage types||Two SD/SDHC/SDXC slots (UHS-II support on one)|
|USB||USB 3.2 Gen 1 (5 GBit/sec)|
|HDMI||Yes (micro HDMI)|
|Remote control||Yes (wired, wireless, smartphone)|
|Body and Battery|
|Battery description||NP-FZ100 lithium-ion battery and charger|
|Battery Life (CIPA)||650|
|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″)|
Compared to its predecessor the a7R III, The biggest upgrade can be found in the rear LCD resolution, which increases 1,440,000 to 2,359,296 dots. The USB port has also been upgraded from a USB 3.1 Gen 1 Type-C Port to a faster USB 3.2 Gen 1 Type-C Port. Other than these 2, the a7R III and a7R IIIA are equal in specifications and performance.
Depicting scenes in intimate detail
The image processing system has evolved to deliver high resolution and low noise throughout a wider ISO range. The camera depicts the mood of every scene’s surroundings as well as texture of details.
42.4MP full-frame Exmor R™ CMOS sensor
The Exmor R sensor’s back-illuminated, gapless on-chip lens design increases light sensitivity and provides wide dynamic range, despite its high resolution of 42.4MP.
Greatly enhanced image processing
A new front-end LSI and BIONZ X™ boost processing speed and are teamed with the Exmor R™ sensor to deliver up to 15-stop dynamic range at low ISO sensitivity for stills, enabling richer tonal expression.
Wide standard ISO 100-32000 range
The standard ISO range has been extended to ISO 100-32000 (expandable to ISO 50-102400), and noise has been reduced by as much as a full stop in the mid sensitivity range.
14-bit RAW output for rich gradations
14-bit RAW format output contains rich tonal information from highlights to shadows, and is available even when shooting in silent or continuous mode.