.ARW · 2020 · 12 MP full-frame

Sony A7S III RAW Files: Open, Cull & Edit .ARW Free

A video-first hybrid body whose stills are usually a secondary output from run-and-gun video shoots or behind-the-scenes coverage. Low resolution keeps files small, but shoots can still be lengthy given the camera's video-centric use. Sorting the handful of usable stills out of a long shooting day is the typical task here.

Sony A7S III RAW at a glance

RAW formatARW — Sony Alpha RAW (.ARW)
Sensor12 MP full-frame
Resolution12 megapixels
Typical RAW sizeabout 10-14 MB
Released2020
RAW options14-bit ARW RAW with lossless-compressed as the default option.

Editing A7S III files with imagic

imagic opens .ARW files from the Sony A7S III natively on Windows and macOS. Point it at a card or shoot folder and it builds previews, scores every frame for sharpness, closed eyes, and composition, and groups near-duplicate bursts — so a full shoot collapses to its keepers before you edit anything.

Processing runs through imagic's own built-in RAW engine, entirely on your machine: batch-apply one look across the keepers and export JPEGs in a single pass. Nothing uploads, which matters at about 10-14 MB per frame. The 500-export trial is full-featured and needs no card; licenses are one-time, from €19.

Frequently asked questions

What RAW format does the Sony A7S III use?

The Sony A7S III writes ARW files with the .ARW extension. 14-bit ARW RAW with lossless-compressed as the default option.

How big are Sony A7S III RAW files?

Expect about 10-14 MB per frame from the 12 MP full-frame sensor, depending on compression settings and scene detail. A full shoot adds up quickly, which is why culling before editing matters on this body.

How can I open Sony A7S III .ARW files for free?

imagic opens ARW files from the Sony A7S III natively on Windows and macOS, the 500-export trial needs no card. It culls the shoot with AI quality scoring, groups duplicates, and batch-processes keepers locally through its own built-in RAW engine.

More about ARW

The A7S III's .ARW files share their structure with every Sony body using ARW: the full ARW guide covers compression variants, free openers, and conversion options in depth.

Step-by-step guides for .ARW files:

Other Sony bodies

Sony A6000 Sony A6300 Sony A6500 Sony A6400 Sony A6100 Sony A6600 Sony ZV-E10 Sony ZV-E10 II

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Cull a A7S III shoot before your coffee cools

AI quality scoring, duplicate grouping, and local batch processing for .ARW — free for 500 exports, no card required.

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