www.bluefireball.com

Description/Uses:

• 2" adapter for prime focus photography through a telescope with Nikon D/SLR cameras
• Provides an unobstructed aperture of 47.5mm (1.87"), up to 10mm more than with a conventional T-ring or prime focus adapter
  
• Fits into any telescope that uses a 2" eyepiece focuser
  
• Has a standard 2" nosepiece on one side and a Nikon camera thread on the other side
• The 2" nosepiece inserts into the telescope focuser. The Nikon mount side attached directly to the camera body without the need of an additional T-ring
  

Features:

• Reduces vignetting and increases the useful field of view, especially on camera models with a full frame CCD sensor
• Eliminates the need for a separate T-ring for your camera since one is integrated into this adapter
• 2" barrel features safety recess groove
• Threaded to accept standard 2" (M48x0.75) astronomy filters
• Adapter is internally baffled to reduce stray light reflections and improve contrast
  

Specifications:

• Total Length = 53mm (2.08")
• Optical length = 8.2mm (0.32")
  
• 2" nosepiece length = 39.7mm (1.56")
• Weight = 1.4oz
  

Thread Specifications:

• 2" filter thread = M48x0.75 Female