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 5X high power Barlow Lens(Full black) As a T adapter, it allows attachment of DSLR camera to the prime focus and astronomical photography to your telescope. Accept 1.25inch filters. Just remove the optical glass part and add the filter on if need. Works on Celestron, Orion , Sky-Watcher , Meade and most brands of telescope. The body is full black metal constructed and precisely CNC-machined. Includes both end caps to protect against dust. This Barlow comes with a steel screw to securely hold your eyepieces Works great for the price.