Thanks, that was some cool info. I was toying with the idea of getting a cheap one to use when shooting. Have it hover over the targets but in front of them to record impacts on steel or misses to determine where they are going. Depending on the caliber and how dry or wet the ground is sometimes it's difficult to see ground impacts at 300-40 yards so you can adjust sights or POA. Today would have been a perfect day as we started shooting at this basketball sized rock that sits at about 400yds out and the ground was just damp enough that we could only spot the misses about 1 in 4 or 5 shots. The hits you can see from the white rock dust from the impacts.