11.25 inch diameter T adapter, suitable for all standard 1.25 inch telescopes and microscopes. 2T2 T ring adapter, allow to connect for Sony E mount camera to 1.25 inch telescopes and microscope. 3Extension tube suitable for all standard 1.25 inch telescopes and microscopes. 4Using method, first screw extension tube into adapter ring, then install extension tube into camera body, finally connect to the telescope/microscope. 5Ring adapter cannot automatic focusing, adapter ring has no electrical connection and requires manual aperture and focusing settings. Condition: 100% New Item Type: 1.25 Inch Extension Tube Kit Material: Alloy Color: Black Interface: 1.25 Inch,T2, M42*0.75mm, E Fitment Telescope: ForT2Mount Telescope Fitment Camera: ForSonyE Mount Camera Weight: Approx. 188g 1 x Extension Tube 1 xAdapterRing