2.7" Thread-On Extensions for Astro-Physics Focusers and Accessories

Description This series of extensions is designed to utilize the robust 2.7" Astro-Physics thread size, while providing a variety of lengths for use with barlows, telecompressors and camera systems. These extensions can be used in various combinations to achieve the perfect spacing distance for your system. These extensions thread directly into the drawtube of the 2.7" focuser and into the 4" to 2.7" Adapter (A1024), or its shorter version (A1024-A), which fit the 4" focuser. They feature knife-edge baffles and an interior that is painted flat black to eliminate internal reflections.  Accessories with 2" nosepieces can easily be attached by using the ADA2003, ADA20132, ADA200 (discontinued), or ADA2013 (discontinued) 2" Adapters with Thumbscrews. Thread-on Extension with the following applications: Achieve proper spacing requirements for your CCD camera system - it can be used in combination with other extensions and with the CCD Adapters for the Astro-Physics Prime Focus Field Flatte