Astro-Physics 2.7" Thread-On Extension
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This is extension is 2.55" in length. It threads 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. Retail is $69 and is being offered here $35. I cover shipping and PP fees.
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