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Barlow Lenses Explained: The Cheap Upgrade That Doubles Your Eyepiece Collection
If you’ve been stargazing for more than a few weekends, you’ve probably run into this problem: you own two or three eyepieces, and there’s always a gap between the magnification you have and the magnification you actually want. A Barlow lens is the cheapest, simplest way to close that gap, and it’s one of the…