Good product - ATN ThOR 4 4-40x75mm Thermal Smart HD Rifle Scope 30mm Tube

I have tried the Atn Thor 4 1x10, 2.5x25 and now have the 4x40. All of them had a 640 processor. The 1x10 was very unclear with the 19mm lens compared to the 2.5x25 with the 50 mm lens. There is not much difference in clarity between the 2.5x25 and the 4x40. The lens size on those two scopes are almost the exact same with a difference of 10 mm not 25mm like they claim (50mm-75mm). Both scopes are extremely clear with great eye relief which is the downfall of most thermal or nv scopes. Mounts like a regular scope which was a huge selling point for me. Battery life actually does last over 10 hours like they claim and it is a huge upgrade over not having to buy batteries for it. 2 other guys I hunt with have to use 4 AA batteries for their Atn Thor hd scopes and they are constantly changing them and plugging in the battery pack. The only problem I have right now with this scope is on nights where conditions are not perfect the scope will have a dark spot in the center of the scope which takes up about half of the fov and it’s hard to see heat very clear from a distance. I think Atn calls it ghosting and they said they are working on it. The video function is awesome and a must have for any thermal scope so u can figure out why your missing and how far to put a lead on an animal running