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Astro-Physics Thread-on Focuser Extension, Threads into 2.7" Focuser and Accessories, use for precise spacing - 2.5" (63.5 mm) long



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.

The re-design of these extensions include a lip on the outer diameter to prevent the extension from being racked inside the focuser housing.

This extension is provided with Astro-Physics refractors that have the 2.7" focuser. It is for use when observing straight-through without a diagonal or when imaging without a prime focus field flattener. [Note that this extension may be too long except for special applications.]

This extension has a net spacing distance of 2.55" (64.8 mm).



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