The Panasonic LUMIX S5 II is one of the most affordable full-frame cameras on the market. It offers a fantastic range of video features at a relatively reasonable price, making it our top pick for most people. With excellent ergonomics, build quality and in-body image stabilization (IBIS), it has a number of useful video tools, including waveform and vectorscope functions to monitor your exposure and the ability to load custom LUTs. Video quality from the sensor is also fantastic, even in low-light conditions.
In addition, the camera supports internal 10-bit 4:2:2 recording, with a wide range of recording formats and codecs, although you should opt for Panasonic LUMIX S5 IIX if you need internal ProRes codecs or RAW video output. L-mount lenses can also be quite expensive, although you can always use cheaper or vintage lenses with a lens mount adapter. Otherwise, the Sony α7 IV is another excellent option for 4k video, with a very wide range of lens options, including more affordable third-party lenses. However, it is more expensive and does not support shutter-open recording in higher resolution.