This Olivon Extendable Camera Adapter is barreled for 2″ eyepiece ports, allowing you to attach a camera with a T-Adapter to your telescope. Extension tubes are often necessary for astrophotography, when the existing connections to the eyepiece port doesn’t give enough length for the camera to achieve proper focus; especially when using reflector telescope. With this flexible extension adapter, you can adjust the adapter to find the ‘sweet spot’ for your camera to find focus for your subject.