***** **********Best Quality Guranteed. *****2" diameter T-2 focal adapter, fits into all 2" focusers. *****T-2 external thread on the accessory side, the generative surface design to stop lens falling out. *****Black anodized to minimise reflections, filter thread for 2" filters. *****Allows you to quickly attach your SLR camera to any telescope with a 2" focuser. *****The light path is extended by only 3mm, which is good news for the focus position as it is hardly changed.