Condition: 100% Brand New Item Type: Astronomical Telescope T Adapter Ring Brand: Datyson Model: 5P0012B Material: Metal Color: Black Internal Thread: M28.5*0.6mm and M30*1mm External Thread: M42*0.75mm Weight: Approx. 16g Interface Size: Approx. 31.7mm/1.25inch 11.25 inch T mounting adapter ring, used for astronomical telescopes. 2Compatible with 1.25 inch telescope focalizer, adapter ends are threaded to accommodate standard 1.25 inch filter. 3Allows DSLR or SLR camera equipped with T ring to mounted on telescope. 4Internal threads of the adapter completely fixed to minimize reflections. 5Easy to install and operate, convenient to use, more practical.1 x Astronomical Telescope T AdapterRing