This T-Ring is designed to work with Nikon F mount 35mm or digital SLR camera.
A T-Ring couples your 35 mm camera body to a T-Adapter, Radial Guider or Tele-Extender. This accessory is required if you want to do any type of photography through a telescope or spotting scope. Each camera manufacturer has a different mount, which requires a specific T-Ring, so Celestron offers a full line of T-Rings.
To use a T-Ring, remove the diagonal and/or eyepiece from your telescope (some models require use of an eyepiece — see your instruction manual). Then you need only remove your normal camera lens, attach the proper T-Ring for your camera, and mount the combination to the rear cell of your telescope or spotting scope with a Celestron T-Adapter.