So you have heard about the lens lengths of FLIR thermal cameras. Then they talk about the FOVs of the cameras (how wide can the cameras can view - so, field of view).
For a FLIR Vue Pro, they talk about lens, like 9mm, 13mm... but hardly mentioned the FOVs. On the other hand, for a Boson or a Duo Pro R, they mainly talk about the FOVs and less talk about the lens!
All seem to be very confusing and hard to keep track of, especially, when you need to compare the cameras to buy for your projects.