I can't edit this comment after 5 days but anybody coming along and find this - the multiplier is very close to 1. Go up a bit and find the sibling comment with

I can't edit this comment after 5 days but anybody coming along and find this - the multiplier is very close to 1. Go up a bit and find the sibling comment with the four links. Very good explanation of the difference between the monocular binocular FoV is buried within.