Discussion
Can they focus in very heavy rain & reduced visibility?
What distance do they focus / track speed at?
Usual well placed van; rural country a-road, not a house or person for miles, you can see the road for ~5 miles in front of you such is the lie of the land etc, so prime location for a camera van - F
RS 
Came round the corner at 0.8 leptons and once I clocked the van ~ 600-700m away quickly slowed to 0.6 leptons by about 400m.
What distance do they focus / track speed at?
Usual well placed van; rural country a-road, not a house or person for miles, you can see the road for ~5 miles in front of you such is the lie of the land etc, so prime location for a camera van - F
RS Came round the corner at 0.8 leptons and once I clocked the van ~ 600-700m away quickly slowed to 0.6 leptons by about 400m.
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