T-Adapter EdgeHD 9.25", 10", 11"T Adapter for 9. 25, 11 & 14 EdgeHD optical tubes. It threads onto the rear cell This T Adapter allows you to attach your DSLR camera to the prime focus of your EdgeHD telescope T Adapter for 9. 25, 11 & 14 EdgeHD optical tubes. It threads onto the rear cell. This T Adapter allows you to attach your APS C or Full Frame DSLR camera to the prime focus of your EdgeHD telescope. This arrangement is used for terrestrial photography and short exposure lunar