I'd like to collate a view on:-
1. Max range to Spot a fox. Typically spotting eyes with a lamp but maybe include NV for comparison too
2. Max range to Identify a fox with gun optics without any doubt such that a shot could be fired safely.
3. With what kit & what's its cost?
I'd like to avoid any debate about the ability/gun/calibre/bullet/ethics etc of shooting a fox at that range. That depends on so many things & is debated elsewhere in depth. This is purely about lights & optics to collate what people can manage & with what kit, and at what price.