It offers 1.25 inch mounting sizes on telescope side.
Outer and inner thread, one side is to fit T-ring, the other side is 31.7mm(1.25''), which fits for telescope mount adapter.
It is compatible for Nikon/Canon/Sony DSLR camera
Specifications:
Product name: Telescope Extension Tube
Color: black
Material: aluminum
Size: 9cmx4cm/3.54''x1.6''
Diameter of inner thread: 3.17cm/1.25''
Package Included:
1 x Telescope Mount Adapter
1 x T-Ring
1 x Extension Tube
