The 1.5mm Stainless Steel Fine Tuning Ring for T thread allows fine adjustment of spacing with much higher precision than with T2 extension tubes. Strength is guaranteed with metal rings, unlike some Delrin types.
A 1mm version is also available
GSO and Clones to T Thread Adapter for Right Angled Finders connects ZWO,QHY6 and Orion SSAG cameras with T Thread to GSO (& Clones) 8 x 50 & 9 x 50 right angled finders.
Our standard M48 to T Thread adapter connects T thread cameras / accessories to any scope, lens or accessory with male M48 (2″ filter) threads. If threads are fully engaged this adds about 6mm to the light path. For a low profile (4mm) version click HERE
Celestron 1mm T Thread Adapter for Right Angled Finders connects ZWO,QHY6 and Orion SSAG cameras to Celestron Finders with 1mm rear finder thread. Most Celestron finders are the same as Sky-Watcher  with 11 fine threads cut into the rear of the finder tube.
However some are different and we now offer this adapter for those Celestron finders with 8 coarser (1mm) rear finder threads. Simply remove the eyepiece and holder to check.