You can tell the difference between two fawns one being a doe and the other a button at 100yrds just by looking at them? Who said anything about comparing them to an adult doe?I didn't. Who the hell hunts deer in Pa.with a larger than a 2.5 to 10 scope or lugs around heavy glass?Or how many people spend 1000$for these things.Maybe 5% of the hunters.You can't tell just by looking at them.I will call anyone a liar on that if they use reg normequipment.