The A7S III will record video internally in its XAVC all-intra (H.264) format with 10-bit, 4: 2: 2 color sampling and a maximum of 600 Mbps. For example, on Panasonic’s GH5 you can capture a maximum of 400 Mbps. In addition, Sony has tested 4K 60p capture for up to an hour, although it stated that there is no recording time limit in theory. It is possible for a new heat management structure to be built into the camera.
If you use Sony’s S-Log2 / S-Log3 picture profile, you will see up to 15+ stops of dynamic range, which is much higher than other consumer cameras. For HDR shooters, it will also capture 10-bit HLG with 4 presets and allow you to record 1080p / 720p proxies at the same time. In addition, you can capture full-frame (4,264 x 2,408) 16-bit RAW video externally via full-size, type an HDMI port, although Sony did not reveal which external recorders support Will be done.
The A7S III will be able to handle those relatively high internal data rates thanks to the world’s first CFExpress Type A / SD UHS dual slots. Yes, there are two slots each for UHS II cards and CFExpress Type A, although you can only use one or the other at a time. However, two cards can be used simultaneously for simultaneous recording (backup), relay recording (card to card) and sort recording (still or video, JPEG / HEIF and RAW formats).
What can you ask, is CFexpress Type A? Well, this is a new format being launched with this camera, and uses CFexpress technology with a smaller card than the current Type B format. While it is slower than Type B, 800 MB / s and 700 MB / s read / write speeds are still 2.8 times faster than SD UHS-II. At the same time, it also supports the SD UHS II format.
This makes sense, as UHS II cards are cheap and easy to find, and CFexpress Type A cards will likely be less likely when the cameras go on sale in September. When they arrive, Sony’s 80GB CFexpress Type A card will cost $ 200, while the 160GB card will cost $ 400.
The A7S III is the world’s first camera with a 9.44 million dot EVF developed by Sony. It offers a very high 0.90x magnification, 41-degree field of view and 25mm high eye-point. With that level of resolution (equivalent to about 3.4 megapixels), this optical viewfinder should be clear enough for purists as well.
The model is the first in the A7S series with phase-detecting autofocus, and Sony has not skimp here either. It offers 759 phase- and 425 contrast-detection points, with 92 percent coverage and AF available up to -6 EV in low light. If you are into photography, it allows up to 10 fps burst with AF / AE, capable of capturing up to 1,000 uncompressed RAW files (with CFExpress Type A card).
As you expect, you’ll also get real-time eye autofocus for both video and stills, with 30 percent better recognition according to Sony. Better still, it works in all video modes including Full HD at 4K / 120p and 240p. If you want to focus from one subject to another, you can choose from seven AF transition speeds. And if you’re trying to track other objects like cars, you can touch them to select them on the LCD display.
In fact, the LCD display is the first in Sony’s lineup that finally supports full touch functionality for menu operation. It is also fully artistic, so it rotates sideways and rotates 360 degrees. Together with body stabilization and improved rolling shutter, this should make the A7S III a very good vlogging camera.
To improve touch operation, Sony has redesigned the A7S III’s menu system, making it more logical and better for touch. Sony certainly had the worst camera menu system before, but now it seems to be the best. For example, it is very easy to find sub-menus because they now pop out in the side. It also has a dedicated menu for movie modes, according to which the settings change. It also looks very easy to customize menus and buttons.
As with all of Sony’s recent full-frame mirrorless models, the A7S III offers built-in 5-axis image stabilization. It promises no image quality compromise, as it can maintain 4K, 3,840 x 2,160 resolution with only very minor cropping in active stability mode.
Other features include a dedicated microphone and headphone jack, as well as power distribution support and LAN adapter connectivity with a USB Type C port. You can connect Sony mics directly to the digital M1 shoe and even make 4-channel 24-bit recording using Sony’s XLR-K3M adapter. Finally, it is worth noting that the A7S III weighs 614 grams, which is lighter than the Canon EOS R5 and about half the weight of Panasonic’s S1H.
A camera with such capability is not cheap, but certainly the prices are in line with previous A7S models. It will arrive in August for $ 3,500 for the body in just a while – $ 500 more than the A7S II, but $ 400 less than Canon’s EOS R5 and Panasonic S1H.
Updated 10:30 AM: Added availability and pricing for CFexpress cards.