CELESTRON 48MM T-ADAPTER FOR EDGEHD 9.25”, 11”, AND 14”The 48mm T Adapter is the accessory of choice if youd like to attach your full frame DSLR or astronomical camera to a Celestron EdgeHD optical tube. With DSLR CCD chips getting larger, Celestron created the 48mm T Adapter to reduce vignetting and provide a larger light path to your cameras sensor, producing exceptional astrophotos. The standard T Adapter for EdgeHD 9. 25", 11", and 14" comes with a 42mm T Thread for a 42mm T Ring. This smaller 42mm T