Looking for the best Barlow Lenses For Telescope Eyepieces? Check out our comprehensive guide with the 10 best options available.

Orion’s High-Power 1.25″ 5x 4-Element Barlow Lens gives any eyepiece a quintuple-power boost. The Barlow’s body is aluminum, and it has a rubber exterior.

How does one determine magnification? I have an Edmund Scientific Astroscan, 4-1/8-inch aperture, F/4.2 reflecting telescope, used with a 2.5x Barlow lens and a 28mm Plossl eyepiece.