A phone can take on most content creation jobs these days, so why not give it the support it needs – that's the theory behind a gimbal which is a camera stabilizer that helps produce more professional content.
This is a device of many generations, but since the Osmo Mobile 6 – or OM6 – DJI has brought a professional feel with an analog control wheel as well as the joystick. This can, for example, use NFC to take control of the 'focus' effect in on the phone so the device gives you wider cinematographic controls.
