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Amazon.com : Orion 8762 2-Inch 2x Barlow Lens : Telescope Eyepieces : Electronics
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Amazon.com : Celestron Omni 2X Barlow Lens : Barlow Lenses : Electronics
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Amazon.com : MEOPTEX 1.25" 2X Barlow Lens-2 Elements,w/M42 & Filter Thread,FMC : Electronics
Amazon.com : MEOPTEX 2" 2x ED Barlow lens-2 elements,FMC : Electronics
