Hasta La Motion!

I’ve completed a track in Boujou that is 95% of the way there, but there is a slight distortion in the camera solve where the 3D scene containing the solved points is ‘stretched’, which in my experience is due to a slight offset in the camera solve’s focal length.

In PF-Track, the matchmoving software that I’m more familiar with, you have the Focal Length Tool, which gives you a hand’s on way of estimating the focal length before solving the camera.

What’s Boujou’s method of dealing with this problem?
Are there various tools that can help?

Thanks!