All of these cameras are full frame mirrorless cameras. There are cheaper options out there, but I would prioritise these two features for birth videography. In an ideal world, you want your camera body to be able to shoot 4K at 60fps or higher (slow motion, but you're able to crop in post production), but of course this comes with a hefty price tag.
When it comes to purchasing a lens you are better off investing in a wide aperture zoom lens (f-stop under 3, and a range from 25-100mm). This way you will only need the one lens and won't need to change lenses throughout the birth, plus you will be ...
