The A7 III, with its compact and ergonomic design, has been a very popular camera for video recording. The battery life is drastically improved compared to the previous A7 Series cameras, which was a primary complaint of Sony Alpha users and is particularly beneficial for underwater video, as it allows you to shoot for much longer without the need to open the housing. The A7 III also has dual SD card slots, which play an additional role in the maximum allotted time you can record underwater without having to open the housing. The auto-focus during video works very well.
Are GoPro adhesive mounts reusable?
The Panasonic Lumix GH5s has been the go-to mirrorless camera for video use over the last two years and even with the advent of newer full frame mirrorless cameras (as listed above) the GH5s still holds its own as a professional video system. There are various underwater housings available for the GH5s and with Nauticam’s newest version of the NA-GH5 you have the option of including an M28 bulkhead for use with HDMI 2.0 and the Atomos Ninja V recorder.
Then there's resolution and video quality. You'll want a camera that can record in 4K for sure. The top-end models from DJI and GoPro offer 60fps 4K with digital stabilization that's absolutely incredible. They're also not limited to ultra-wide views; you can set a narrower angle to remove lens distortion, making them solid choices for vlogging and travel logs.
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