Sony Alpha 7S III, the real video flagship

Last month, Sony finally released the Sony Alpha 7S III, which has long been rumored. As a camera for positioning users who need dual images of photos and videos, this time, it has carried out all-round video upgrades, such as 4K 120P and 10 bit 4: 2:2 color depth, 15 + level dynamic range, thermal system optimization, ultra-high sensitivity, all intra recording, fast focusing, enhanced anti shake, and lower jelly effect; moreover, Sony α 7S III has finally added flip screen and full touch operation this time. Let’s take a look at the overall performance of this machine. < p > < p > Sony’s α 7S III still continues the design essence of Sony’s α 7 Series in appearance. In fact, it is more similar to Sony’s α 7R IV in terms of body thickness, handle width, and touch of buttons. However, Sony’s α 7S III has changed a lot in details. < / P > < p > first of all, the flip screen is finally added, and it also supports touch. However, the positions of most of the buttons in the fuselage have not changed, except that C1 has changed the position compared with the Sony α 7R IV, so you can see a very conspicuous video recording button on Sony α 7S III, which is clearly marked with red. < / P > < p > in addition, Sony α 7S also has a new position The III adopts an electronic viewfinder with a magnification of 0.9 × 9.44 megapixels; the experience effect is comparable to the optical viewfinder, and sometimes even better than the optical viewfinder; < / P > < p > in terms of storage, Sony α 7S III adopts a dual SD card slot design, and is compatible with dual cfexpress The type-A memory card, I have to say that Sony’s design is very good. Considering the cost of cfexpress type-A memory card, Sony has given two compatible designs for different card types at once, and it is also a dual card slot record. I think this design is appropriate nice. In terms of interface, most of the interfaces of Sony’s α 7S III are the same as those of Sony’s α 7R IV. however, this time, it is equipped with a new full-size HDMI 2.1 interface, and combined with the new HDMI 2.1 interface, it can output 4K 60p 16bit prores raw to the external recorder of ATOMOS; < / P > < p > as introduced at Sony’s press conference on that day, Sony’s α 7S is equipped with a new full-size HDMI 2.1 interface All of the III’s are new. The flip screen and full touch operation are already great innovations. The brand-new menu design is the innovation in the innovation; Sony α 7S III has finally adopted a brand-new menu design, following the horizontal hierarchy structure, so it is easier for users to find the menu they want to set. In addition, with the touch operation, it can realize the smooth operation experience like waterfall flow on Sony α 7S III, which is impossible to achieve on any Sony machine in the past. < p > < p > Sony α 7S III adopts a hybrid auto focusing system with 759 phase detection points and 425 contrast detection points, which can cover 92% of the viewing range, and also supports the detection function of human and animal eyes. Compared with any previous Sony models, the focusing system has been greatly improved, and the focusing ability of – 6EV is supported. Moreover, the video focusing capability of Sony α 7S III can be safely used. It not only has fast focusing speed, but also is very accurate. In many cases, it can free hands when focusing manually. < p > < p > Sony Alpha 7S III uses full-pixel reading without pixel merging to record video, and is suitable for all recording modes. In 4K mode, Sony Alpha 7S III actually uses 4.2K full pixel super capture to 4K, which supports 4K 60p full pixel non clipping recording, 4K 120P 1.1 times clipping recording, fHD 240p video recording, and supports up to 10bit 4: It is worth noting that although Sony α 7S III does not support dual primary sensitivity settings, the original sensitivity range of s-log3 is ISO 640 ~ 102400, and can be expanded down to ISO 160 and upward to ISO 409600. Therefore, we can flexibly choose different sensitivity to shoot in different scenes. < / P > < p > next, I’m going to talk about color depth and chroma sampling. Sony α 7S III supports 10bit 4:2:2, 10bit 4:2:0 and 8bit 4:2:0 video recording, and 10bit 4: 2:2 is suitable for all video recording modes. It is also of great significance to shoot 10bit content in the early stage. It can present a smoother gradual change, because the details recorded by 10bit are much more than 8bit, and 16bit color depth recording can be realized through external recorder. However, most of the network videos and Blu ray discs we can see are 8 bit content, No With the development of network technology, I believe it will not be long before we can watch 10 bit video content directly on the network. < / P > < p > all recording modes of Sony α 7S III can be selected from 4:2:2 or 4:2:0, so users can choose flexibly according to their own needs. < p > < p > Sony Alpha 7S III adopts a new h.265 encoding. Compared with H.264, although the code rate is the same as H.264, for example, when recording 4K 10bit 4:2:2 video, the highest bit rate is 280mbps, that is to say, the file volume is the same, but the h.265 encoding records more picture details, so as to achieve higher image quality in the same file volume. < / P > < p > Sony α 7S III has five axis anti shake function. Although in photo mode, it can be described vividly with the compensation ability of 5.5 gear, but in video mode, how many gears can be compensated is really hard to describe. In video enhancement and anti shake, I respectively turn on video frequency enhancement anti shake and turn off video enhancement anti shake, and take some videos, and we can see Sony α 7S III video anti shake ability is quite good. < p > < p > Sony α 7S III adopts a new heat dissipation system. The new heat dissipation structure can keep the image sensor and image processing engine in a normal working range, even at 4K 60p The 10-bit 4:2:2 format lasts for an hour or more of continuous recording time until the battery is dead or full. Although the machine feels very hot, there is no overheat warning, and it won’t stop you from shooting. < / P > < p > about the storage problem, after the release of Sony α 7S III, cfexpress type-A memory card should be the most concerned by netizens. Of course, it is not only its speed, but also its price. But is it really necessary to buy this card to buy Sony α 7S III? In fact, there is only one case that can be used, that is, in S & Q mode, cfexpress type-A memory card is required for shooting xavc S-I all-I 4K 120P video; therefore, the purchase of the V90 ush-ii memory card can satisfy Sony’s α 7S III. < / P > < p > although Sony α 7S III is a video camera, this machine can meet the needs of some users for photo shooting to a certain extent, although I can’t think of anyone who will take this machine to shoot video III supports up to 10fps continuous shooting, combined with 759 phase detection points of the fast hybrid auto focusing system and enhanced real-time eye focusing function, it can well meet the user’s demand for still photos. < / P > < p > in conclusion, although Sony’s α 7S III is a “late” machine, and although the product logo of Sony’s α 7S III is still III, in my opinion, it is more appropriate to call this machine “Sony α 7S IV” or even Sony α 7S V, because, as stated in the release meeting, Sony α 7S III is more suitable Everything in III is brand new: new sensors, new processors, new video recording specifications, new encoding formats, new menus, new touch screens, new card slots, new focusing systems For Sony users, the touch screen, new menu and new focusing system are all very fragrant, which are not available in the previous four generations; Sony α 7S III can be called the real video flagship. 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Author: zmhuaxia