Levenhuk ED-2x Barlow Lens – Buy from the Levenhuk official website in USA
B2T | 2x achromatic Barlow with camera adaptor (T2) Teleskop-Austria | Teleskop Mikroskop und Fernglas Shop
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