Amazon.com : Celestron 93230 8 to 24mm 1.25 Zoom Eyepiece & Omni 2X Barlow Lens : Electronics
Celestron
Celestron Omni 2x Barlow Lens 1 1/4" 93326 | eBay
Celestron Barlow Eyepiece 2x Barlow Lens Eyepiece 1.25 Inch Insert The 2x Barlow Lens Between The Eyepiece Not Monocular - Telescope - AliExpress
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
Barlow lens Test with Celestron Atromaster 130 EQ - YouTube