Last week we compared the FLIR VUE Pro cameras side-by-side.
This video shows the difference in Field of View for the VUE Pro 640×480 9mm, 13mm and 19mm.
The 19mm image is 32°(H) x 26°(W) FoV.
The 13mm image is 45°(H) x 37°(W) FoV.
The 9mm image is 69°(H) x 56°(W) FoV.