Sony introduced a full frame mirrorless a7S III: continuous recording up to 4K/120p, improved autofocus, etc

As expected, Sony has released the a7S III — the third generation of its full-frame mirrorless camera with emphasis on video. It includes a new 12-megapixel BSI CMOS sensor, the latest Bionz XR, improved autofocus, electronic viewfinder (EVF) ultra-high resolution and the ability to capture video in 4K at 120 frames/s.

In addition, Sony claims that a7s III can also record continuously, at least an hour of video in 4K at 60 frames/S. the Company said it became possible due to modernization of the system of heat dissipation in the camera — and even a fan was not needed.

The combination of new sensor and processor allows you to use your own ISO range of 80 to 102 400, which may extend to 40-409 600, and achieve the ability to capture 15 stops of dynamic range. Sony claims that the sensor reads the data twice faster than the a7S II, which significantly reduces the effect of the floating gate. The more sensitive the AF system has 759 points PDAF on the sensor and provides the person recognition, eyes and animals. Sony says that the color reproduction has also improved markedly.

By the way, Sony A7S III also differs in that it is the first consumer camera that support the new high-speed memory card CFexpress Type A. Physical design III a7S a7R is very similar to IV (including build quality and the presence of the stabilizer inside the case), but there are some notable exceptions. For example, the electronic viewfinder has the highest resolution among all that so far we could see — it resolution reaches of 9.44 million points. It is also huge and offers a magnification of 0.91 x.

In addition, it is the first camera series, Sony Alpha with a fully rotatable LCD display, and almost all parameters can be changed using the touch input (finally). The menu system has been improved and became easier to navigate. The camera is equipped with a full-size HDMI port, connectors for headphones and microphone, dual-band Wi-Fi module, support USB Power Delivery. It has two slots for memory cards dual format, both of which can work with SD or CFexpress Type A.

Among the mass of video recording functions, you can highlight the entry in 10-bit 4:2:2 compressed in H. 264 or H. 265, the ability to output in 16-bit RAW at up to 60 frames/s, support for S-Log2/3 and HLG. Camera a7S III doesn’t support DCI or Super 35. Sony A7S promises to release III in late September at a price of $3499 in the U.S. market.


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