Baader T-ring Nikon on T-2

Baader T-ring for connecting Nikon (D) SLR cameras to the standard T-2 thread
Establishes the exact standard distance of 55.0mm from the front contact surface of the T-ring to the image plane of the camera housing
Camera side: Nikon bayonet
Telescope side: T-2 internal thread with 0.75mm pitch