125 inches 5X Barlow Lens Fully Blackened Metal Multi Coated Broadband Green Film with M42 Thread for Standard Telescope Eyepiece Astronomy - Newegg.com
Amazon.com : Barlow Lens 5X, Multi-Coated 1.25" 5X Barlow Lens M42 Thread for Telescopes Eyepiece M42 x 0.75mm Thread T-Adaptor, Can be Attached to DSLR or SLR Camera via a Separate Ring