Gosky T-Ring and M42 to 1.25" Telescope Adapter (T-Mount) for Sony NEX Cameras (Fits NEX-3 NEX-5 NEX-6 NEX-7 etc) Useful accessories allows you to attach your Sony NEX Cameras to the 31.7mm eyepiece diameter telescope.(FOR SONY NEX3 NEX5 NEX7 camera ) Having the right equipment to shoot art-gallery images of the heavens starts with the right telescope, camera and camera adapter, and ends here. With T-ring, you can use M42 Lenses on Sony NEX E mount camera. Inner ring can be rotated with a standard allen key (allen key not provided) to ensure lens is always right way up All metal construction and anodizing aluminium process, durable for long time use. Easy and smooth for you to use.