Sony has officially announced the outstanding A7R IV camera model with upgraded Exmor R sensor generation to 61 MP resolution. Another model of Sony's message is Another Milestone, which continues to focus on high resolution but still brings impressive performance thanks to hardware with real-time continuous focus, 10 fps continuous shooting. and shooting 4K HDR. Many innovations are brought to Japanese users by the Japanese electronics company to meet the requirements of a high-resolution mirrorless model.
The heart of the A7R IV series is a 61 MP sensor with backside-illuminated CMOS technology (Exmor R) with a maximum resolution of 9,504 x 6,336 pixels (60,217,344 pixels). The BIONZ processor X combined with the LSI peripheral chip is still the machine's core hardware. In APS-C mode, the captured images have a resolution of 26 MP. In Pixel Shift mode, the camera produces a resolution of up to 240 MP. ISO range of useful machines is 100 – 32,000 and can be extended to 50, up to 102,400.
Thus, A7R IV is capable of capturing 10 frames per second with 68 RAW compressed / JPEG Extra Fine images, or 30 uncompressed RAW + JPEG images with a mechanical shutter speed of 1 / 8,000 seconds.
Sony has built-in Real-time AF focusing technology, including the ability to focus on eye detection for still images, video, and identify objects of people and animals. Besides, the feature Real-time Tracking AF follows the object. These technologies are available on the A6400 and have been recently upgraded to the A9 flag-ship camera recently. The 399-point phase focus score of the A7R III is increased to 567 points on the A7R IV with a 74% coverage of the frame.
Sony has not yet upgraded the movie recording feature for A7R IV, maybe they want to save for the next series. So the notable addition is the HLG (HDR) profile as well as the ability to focus on eye recognition, file format or bitrate unchanged. You expect 4K @ 60fps to wait. Although the sensor still supports full-readout, it is still really attractive for those who capture the best quality movies from high-end lenses.
The design of the A7R IV has several design changes, such as the parameter setting right next to the wheel that selects the enhanced shooting feature to make it easier for users to manipulate. The joystick button with embossed pattern gives a more comfortable use.
With the increase of the 'dot' sensor, Sony also upgraded the OLED electronic viewfinder to a new version with 5.76 million pixels (UXGA) resolution with the same magnification as the previous generation. The viewfinder can also adjust the high-speed frame rate mode of 100 fps / 120 fps.
Sony offers a feature for the Multi Interface (hot-shoe flash) connector that is digital audio communication. Essentially this is an A / D audio converter from the newly released microphone of the company, ECM-B1M, which enables the device to produce higher quality sound for movie shooting, lessening the connections and increasing the number of wires. battery life. Previously, Mi Shoe interface only connected as analog.
To enhance communication to computers, Sony strengthens Wi-Fi 2-band connectivity, adding 5 GHz standard to make wireless data transfer faster thanks to FTP Server. USB-C connection is upgraded to standard 3.2 Gen 1 to increase bandwidth stability. In addition, the SD memory card slot supports UHS-II standard for up to 300 MByte / s access rate. Pin Z (NP-FZ100) continues to bring the number of shots to about 670 plates (via LCD) or 530 plates (EVF), the extended vertical grip accessory with 2 VG-C4EM batteries sold separately to meet the needs high demand.
Expected, the Sony A7R IV will be available in the market in September 2019 at a reference price of US $ 3,500, 300 USD higher than the previous version.