T- to C-mount lens adapter
T-mount to C-mount lens adapter.
This has the standard 1-inch x 32TPI C-mount threads on the inside, and M42x0.75 T-thread on the outside.
Use this to attach a microscope or small security-camera lens to your camera’s M42x0.75 T-thread.
Simply thread the adapter into the camera T-thread, and thread your lens or microscope into the C-mount threads.