I'm trying to help a friend with a rat problem. He has a hazelnut grove next to his house and it is overrun with rats and mice and they're getting into his house. I tried to use my DIY nightvision system to help him out, but the distances are too close to focus. I'd be shooting between 2-35 yards. They have no fear of humans, but I need to be able to see them to shoot them. At 4-5 yards my scope works, but anything closer I can't focus on it. So I need something with a short focus distance. During the day I could just shoot them with open sites, but I night I need the scope cam.