Sony A7s III Mirrorless Camera Review

A7, A7R, and A7S are the three lines of Sony’s A7 series which includes Sony A7s III Mirrorless Camera. Sony A7 III, is an all-rounder, while the A7R cameras, such as the Sony A7R IV, are high-resolution versions. Sony A7S III is the long-awaited update of Sony A7S II, which is the most video-centric cam.

Sony A7S III, as earlier A7S versions, has a full-frame sensor having 12.1 million effective pixels. Maintaining the resolution low helps the camera’s low-light performance by lowering noise levels.

Sony A7S III features the highest-resolution electronic viewfinder we’ve seen to date and is the first Sony A7-series camera to include a vari-angle display, in addition to a slew of other advancements to its video specifications. This is something that videographers as well as photographers have ‘demanded,’ as per Sony.

Sony A7s III Mirrorless Camera Specification

TitleSony Alpha A7S III (Body) Mirrorless Camera
Price In India167999.00
TypeCMOS Sensor
Size W X H35.6 x 12.8 mm, FullFrame inch
Processor ModelBIONZ XR Image Processor
Effective Resolution12 MP Resolution
MountSony E-mount
Built-In FlashNo
Hot Shoe Flash MountYes
ViewFinderYes, Electronic Viewfinder
Display TypeLCD
Display Size3 Inch
Display Resolution Noof Dots1440000 dots
Moveable DisplayYes
Touch ScreenYes
Brightness AdjustmentYes, Levels
Memory Card TypeSD, SDHC, SDXC
IsoAuto, 80-102400 ISO
Auto FocusYes, Contrast detection, Phase detection
Manual FocusYes
Image StabilizationYes, Type: Sensor
Self Timer10 seconds, 2 seconds
White Balance TypeAuto, Cloudy, Custom, Flash, Fluorescent,
Incandescent, Manual
Image File FormatsJPEG, RAW
Video File FormatsMOV
Exposure ModesAperture priority, Full manual, Program Mode,
Shutter Speed priority
Dimensions WxHxD128.9 x 96.9 x 69.7 mm
Weight614 grams
Available Color OptionsBlack
Battery ModelNP-FZ100
Battery TypeLi-Ion
Battery Capacity2280 mAh
No Of Shots600 Shots
Accessories InboxSony A7S III (Body) Camera, Batteries, NP-FZ100 Charging AC Adapter,
User Manual & Warranty Card
Sony A7s III Mirrorless Camera Review

Sony A7s III Mirrorless Camera Features

Although the resolution is like A7S II, Sony A7S III’s 12.1MP full-frame CMOS sensor is new as well as includes a backside-illuminated (BSI) construction. This architecture allows the photosites to receive more light than a traditional CMOS sensor, resulting in improved low-light performance.

Sony claims that employing a BSI layout doubles the readout speed, resulting in a variety of performance improvements.

Sony has also paired the new sensor with Bionz XR, a new processing engine that Sony claims can handle data up to 8 times faster.

This sensor & processing engine combination allows Sony A7s III to shoot video with up to Fifteen stops or more dynamic range at low ISO settings and in S-Log, in addition to improving low-light performance and providing a sensitivity range of ISO 40-409,600 for video.

The A7S III’s stills are said to have a 14EV dynamic range.

The A7S III is also touted to have little rolling shutter (jello) effect because to the faster readout and processing.

Sony A7s III Mirrorless Camera Colour

Sony A7s III supports 10bit S-Log 2 and 3, as expected. According to Sony, the findings produced by S-Log3 are identical to those produced by Sony PXW-FX9.

Sony has been working on the colour science underpinning the S-Gamut3 and S-Gamut3 features on A7S III.

Once s709 LUT has been applied, the camera is said to offer significantly greater colour saturation at high sensitivity (ISO) levels than A7S II.

That’s fantastic news for anyone looking to grade their film, but Sony hasn’t forgotten about inexperienced videographers or those who seek a ‘out of camera’ option.

As a result, Sony A7s III comes with a total of ten colour profiles, four of which are brand new.

Saturation, contrast, shadow, highlight, fade, sharpness, sharpness range, as well as clarity are among the 8 image control factors that can be tweaked.

Sony A7s III Mirrorless Camera Review - 1

Sony A7s III Mirrorless Camera Autofocus

Although the Sony a7S II’s autofocus efficiency isn’t particularly impressive, Sony’s autofocus systems are currently among the best available in a mirrorless camera, if not any camera. I say one of the best because the Canon EOS R6 and Canon EOS R5, which have an astounding capability to detect eyes in the frame – even animals eyes in video – have taken the crown for Eye AF efficiency.

Read Also –Intel Core i9-12900ks Could Push Alder Lake CPUs To New Levels

In any case, Sony A7s III boasts a hybrid AF system with 759 phase-detection points and 425 contrast-detection points, which isn’t surprising. The phase-detection sites cover 92 percent of the sensor, which is useful.

Additionally, the real-time Eye AF system is now accessible, and it is touted to be 30% better than earlier systems. It can also shoot both stills and video. In stills mode, it can recognise either human or animal eyes, while in video mode, it can locate at all human eyes.

Furthermore, AF system is reported to be sensitive down to -6EV, implying that it should be designed to manage in the dim light that the A7S III excels in.

When capturing stills, you want the autofocus mechanism to be as quick as possible, but whenever shooting video, you need smoother, slower focus shifts.


After the Canon EOS R5’s 8K performance, Sony A7S III may appear to be a letdown. I’m sure some videographers were looking for a significant increase in resolution over the A7S II’s 12-megapixel.

Meanwhile, because Sony already has 61Mp A7R IV as well as the 24-megapixel Sony A7s III, keeping with 12-megapixel implies Sony A7s III offers even better low-light performance than its predecessor, as well as a much superior autofocus system, a vari-angle screen, as well as the highest-resolution viewfinder available.

The A7S III intends to make capturing 4K video easier than ever before, and that the video quality will be the best 4K footage you can have in a Sony camera. It does not disappoint, as the footage is of exceptional quality.

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