2" Nosepiece Extension with 48mm Threads (A3703)

Brand :

Part # changed to EXT48-12.7


May 31, 2021 - Part # changed to EXT48-12.7  to more clearly describe its function. 


This 2" x ½" Barrel Extension is a more robust version of T-thread extension tubes. It uses 48 mm threads at both ends (female and male) instead of the smaller 42 mm T-threads. Its internal light baffles are painted flat-black to avoid reflections. Use more than one to increase spacing distance and/or telecompression in 1/2" (12.7 mm) increments.

This extension has a net spacing distance of 0.5" (12.7 mm).

Potential uses:

  • Spacer for the 0.67 CCD Telecompressor (CCDT67) to achieve precise and/or additional telecompression
  • Moves the CCDT67 further into the optical path, requiring less focuser in-travel
  • Use with our 1.25" Adapter (ADA125) when using 2" filters and needing more space for long barrel eyepieces, so as to not strike the filter
  • Extends the eyepiece barrel length of 1.25"/2" eyepieces for use with 2" filters
  • Use with the Advanced Convertible Barlow (BARADV) in front of the MaxBright Diagonal (PMDMAX) for increased magnification
  • Facilitates focus with short focuser-travel systems like Newtonians
  • Use with parfocal rings (obtained elsewhere) to accommodate eyepiece parfocality