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Amazon.co.jp: NEEWER 2X Barlow Lens for Telescope Eyepieces, 1.25" Multi-Coated Metal Lens to Double Your Eyepieces with M42 Thread for Connecting to DSLR or SLR Cameras : Electronics
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Amazon.co.jp: Barlow Lens, 2X Telescope Magnification Lens, Multi-layer High Definition Broadband Purple Thin Film Telescope Eyepiece with 1.25" Interface for Astronomical Telescope Eyepiece : Electronics
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Method of Using the Barlow Lens in the Telescope Stock Illustration - Illustration of lens, optic: 165021248
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