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2X Extender Barlow Lens Metal 2 Inch Astronomical Telescope Accessories Apochromatic High-magnification HD Stargazing - AliExpress
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Amazon.com : Barlow Lens 2X, Bysameyee 1.25 Inch Fully Multi-Coated Metal Barlow Lens with M42 Thread Camera Connect Interface for Telescope Eyepiece : Electronics
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Amazon.com : Bresser Barlow Telescope Lens 5X 31.7 mm / 1.25 Inch 3-Element Design and Multi-Coated : Electronics
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Amazon.com : Bresser Barlow Telescope Lens 5X 31.7 mm / 1.25 Inch 3-Element Design and Multi-Coated : Electronics
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