I want to make a sniper character but there are only two things that make this possible: the Totem Warrior barbarian's 6th-level eagle totem and the Sharpshooter feat.
The Path of the Totem Warrior barbarian gets this benefit from the Eagle totem for its 6th-level Aspect of the Beast feature (PHB, p. 50):
You gain the eyesight of an eagle. You can see up to 1 mile away with no difficulty, able to discern even fine details as though looking at something no more than 100 feet away from you. Additionally, dim light doesn’t impose disadvantage on your Wisdom (Perception) checks.
This means you can see clearly from 600 feet away - the maximum distance you can shoot with a longbow. And the first benefit of the Sharpshooter feat (PHB, p. 170) negates that disadvantage on long-distance shots.
Is there a magic item that provides the PC the same benefit as the Totem Warrior barbarian's 6th-level eagle totem?
I can see the need to multiclass barbarian/rogue, but if I could just build from the rogue class with a single magical item that offers some damage benefits.