Amazon.com : 1.25 Inch 5X Fully Blackened Metal Barlow Lens/T Adapter for Telescopes - Accept 1.25inch Filters-Also Can Be Used for Astronomical Photography - Coated : Electronics
Amazon.com : Barlow Lens 5X 1.25 Inch M42 Thread Fully Multi-Coated Metal Barlow Lense for Astronomy Telescope Eyepiece Kit Accessory USGohin : Electronics
TS Optics 2,5x Barlow 2"
Meade Series 5000 TeleXtender 5x Barlow Lens (1.25") 07671 B&H