The problems people have with seeing only hair at close ranges is a problem with the shooter not the scope.Some people put scopes that are far too powerful on their hunting rifles and others carry their guns with the scopes on too high a power.I have lower powered scopes and carry them on the lowest setting and have no problems at all.If the target is far and I have time I turn up the power,at close ranges I am ready to go.As for the speed factor, studies by the military and other sources have proven that low powered scopes are quicker than open sights.The same goes for running shots which are much easier to make if you shoot with both eyes open no matter what type of sights you use.