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Deer show up piece of cake but you can't see say a deer's head in a patch of bush at 300 metres like the higher end pulsar units or half of a deer out from behind a bush at 600 plus metres hence why...

Yeah I have used one a fair bit. As far as value for money goes in my opinion they are hands down the best but the the focal length is not very long so it is a close range wide field of view thermal....