I have the guide track IR 50mm it's a top unit and performs well, I haven't used it on deer but I would be more inclined to suggest spend your money on better binos and take your time, if they are bedded down the will get up eventually.
If you were closer I'd let you have a look.
I'm in 2 minds about if I'm going to keep mine or sell it and buy better binos.
Nothing wrong with how it performs just not using it.
Flick me a pm if you like
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