Amazon.com : 3X Barlow Lens, 3X Astronomical Telescope Eyepieces Barlow Lens with M42x0.75mm Thread, T Ring Adapter for 24.5mm Astronomical Telescope/Digital Camera : Electronics
Jupiter and Saturn with New 3x Barlow Lens — Stephen Mack
What Is A Barlow Lens and How To Use One
1.25'' Telescope Eyepiece Barlow Lens 3x Magnification Universal T Ring Adapter M42 Thread - Decorative Telescopes - AliExpress
Astromania 1.25" 3x Short Focus Barlow Lens for Telescope Eyepiece - Superior sharpness and color correction
INEXPENSIVE 1-1/4" 3X BARLOW LENS
APM Telescopes. Skywatcher 3x Barlow Lens 1.25" with 4 lens elements
3x barlow lens for telescope multicoated, metal body for telescope 130eq & 100az | eBay
Tebru Lens, 3x Barlow Lens M42x0.75 Thread Interface for 1.25 Inch Astronomical Telescope Eyepieces, Barlow Lens - Walmart.com