Personally, not a huge fan of thermal image, but hey, if it's your cup of tea - it's probably the best of the 3. My personal choice is active illu tech, it gives far better image than intensification and overall, it's the one I felt the best with when trying those out. I do however own 1 thermal vision scope from Outdoor Sports Store | Sporting Goods | GritrOutdoors.com - Leupold LTO Tracker 2, I'm using it time to time, but just not my cup of tea.There are three common types of night vision scopes: thermal imaging, active illumination technology, and image intensification. Which of these three is the best for hunting?