Amazon.com : SVBONY 2X Barlow Lens 1.25 inch Double The Magnification Multi Coated Broadband Green Film Telescope Accessory with M42 Thread : Electronics
Amazon.com : Astromania 2" ED 2X Dual Power Telescope Barlow Lens for Telescopes : Electronics
Amazon.com : SVBONY 2X Barlow Lens 1.25 inch Double The Magnification Multi Coated Broadband Green Film Telescope Accessory with M42 Thread : Electronics
Amazon.com : NEEWER 2X Barlow Lens for Telescope Eyepiece, 1.25” Multi-Coated Metal Lens to Double Magnify Eyepieces with M42 Thread to Connect to DSLR or SLR Camera : Electronics
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