I have an S&B PMII 5-25 x 56 with quoted field of views of:
5.3m at 5x magnification
1.5m at 25x magnification
Given that 25x is five times more magnification than 5x I don't understand why the field of view is not 5 times less.
A simple formula (for an idiot like me) to go from 5x to...