Compatible Cameras: Fits a wide range of Nikon EOS SLR/DSLR cameras; including Nikon D1 D40 D50 D70 D70S D80 D200 and all digital NIkon cameras with an F-bayonet
Telescope Adapter: One end of the T2 T Ring is M42 female threaded and the other is Nikon F-Mount; you can attach your camera freely to a 1.25 inch or 2 inch focuser of telescope by using a appropriate T-Adapter which is not include
Durable Construction: Made of high-precision metal with an anodized aluminum surface to ensure durability; the inner wall is designed with matte threads to reduce the effects of light scattering during observation
The extension tube has a M48x0.75 interior thread and a M48x0.75 exterior thread for elegantly solving spacing problems in astrophotography
The required spacing can be achieved by combining several extenders of differing lengths; you can use 1 piece; 2 pieces; 3 pieces or 4 pieces of the extension rings as you like