Um, rich that isn't shot with an anamorphic lens.
The Foton is a spherical zoom that was coupled with a 2x anamorphic adaptor but he's not using it. If he was he would be cropping anyway as the video isn't the right aspect for 2:1 on a 16:9 sensor but he even says on the vimeo page that it is spherical.
Cine zoom lenses will cover the full stills35 sensor (as opposed to cine) as you zoom in because, well, you are zooming in on the image and the projected image plane gets bigger as you zoom in.
So maybe the advice for the thread starter is just buy old, lovely, cheap spherical glass and frame and crop to your desired size? ;)