Sony’s mirrorless Full Frame catalog continues to populate. The brand itself acknowledges that the expedition about a renewal of its body more resilient to low light conditions has already traveled. Five years after the presentation of the A7s II, the Sony A7s III finally see the light.

After Canon hit the table with its EOS R5 and R6, Sony finally responds to the enthusiastic and semi-professional niche of video recording in dark environments.

Sony A7s III, resisting the dark

The camera with sensitivity ISO up to 409,600 it is finally renewed, and it does so while maintaining the relatively low resolution that this capacity gives it. No pixel binning, although the very high resolutions that we have already begun to see in other proposals are also avoided.

And is that the 12.1 MP of the Sony A7s Mark III are not enough to fight for video recording in 8K resolution – it reaches 4K, yes – so they have focused on the latest generation features dodging the war on this metric. Despite the similarities, the Mk III renews both its image sensor and the processing engine.


This new proposal gives it all for low light, which is perhaps too much for photographers who prefer to lose part of this capacity for the sake of higher resolution. Sony claims that the pixels on the A7s III are up to four times greater in area in front of a 42 MP camera like the A7 III or A7R III.

Of course, it has integrated image stabilization in the body -IBIS-, which is capable of correcting up to 5.5 steps of vibrations in the image, just like the previous model.

All for the video

In terms of video recording, Sony promises up to 15 steps of dynamic range on stage –in S-Log3–, supporting color profiles –10 bits (or 16 bits RAW to external media), 4: 2: 2 HLG HDR– and more modern image gradation. They also claim to have renewed the camera’s internal cooling system, with which it is capable of capturing up to one hour of 4K video at 60 frames without interruption.

The A7s III is capable of recording 4K video in up to 120 frames per second, which amount to 240 in the case of Full HD. Sony claims that it has Fast Hybrid AF focus performance improved, which is now available in all shooting modes. Regarding this feature, it claims to have up to 30% higher performance compared to previous generations and solvent even in situations with poor lighting.

The new backlit sensor features a improved ISO performance compared to its predecessor, although there are still no concrete figures. This has up to 759 autofocus points by phase detection.

Memory cards on the Sony A7s IIISony

Where resolution does increase is in the new electronic viewfinder of no less than 9.44 million points. That is, it has a resolution greater than 4K, which will go directly to the eye in a detail similar to the native sensor.

As for its construction, it has a fully articulated fully touch screen –With renewed interface–, which is a novelty in this line of mirrorless cameras. It also supports two SD UHS-II cards, or in CF Express A format, interchangeably and without the need for an adapter. The Sony A7s III has up to 60% more battery life in terms of video recording compared to the Mk II other things being equal.

Sony A7s III: launch, availability and official price

Price and launch of the Sony A7s IIISony

The Sony A7s III will arrive next month September at a price of 4,200 euros.

A sample of his capabilities can be seen in the videos below, produced by Olivier Schmitt and Philip Bloom.

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