Here is a detailed comparison of specifications from the four cameras: The first key difference is obviously the camera resolution – at 36.4 MP, the A7R has the highest resolution among the A7-series cameras and hence has the highest image size, the smallest pixel size and the slowest continuous shooting speed of 4 fps.
At least at the time of writing, the Sony A7R IV is the latest camera to sport a 5.76 million-dot electronic viewfinder, following the likes of the Panasonic S1R and S1, and the Fujifilm GFX 100
The Sony A7R IV boasts a full-frame sensor with 61MP of resolution and also achieves 26MP in APS-C mode, surpassing many APS-C cameras. For the APS-C crop it uses the central part of the lens's image, the best and sharpest section.
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Autofocus has improved on the A7R IV, which will be welcomed by underwater photographers. The A7R IV has almost 200 more phase detection focal points, covering 74% of the width and 99% of the height of the sensor’s surface. Both cameras still have a low light sensitivity of -3EV (@f/2).
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has a socket for a 3.5 mm audio jack. Nikon Z7. Sony a7R IV. With a standard mini jack socket, you can use the device with most headphones. has a stereo microphone. Nikon Z7. Sony a7R IV. A stereo microphone allows to record audio files or movies in stereo without an external microphone. Has timelapse function.
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