A T-ring converts a camera’s lens mount to a standard "T-thread," allowing you to couple a camera body to a camera adapter or, in some cases, directly to the focuser of a telescope. All camera adapters, including INTANE T camara Adapter M42*1, will fit this T-thread.

 The #TR001 T-ring fits the Canon 300D Digital Rebel, also the 10D, 20D, 20Da, 30D, 350D, and 5D digital SLRs. For Nikon owners, the #TR002 T-ring is compatible with the Nikon D50, D70, D70s, and D200.

 Settings:

• Put red marks of the adapter and lens collar together.

• Turn the adapter clockwise till the fixative click.

• Set M42 adapter.

Removing:

• To remove the T-Ring you should unpress fixative pin and turn the adapter anticlockwise.