Lumicon 2" diameter × 2" length — Thread-In Eyepiece Extension Tube Color Filter Compatible with GSO/William Optics Early

Compatible with GSO/William Optics Early Version Crayford Focuser w/o Microfocuser

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25" adapter

Sized specifically for the ASA 10" tube front

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Lumicon 2" diameter × 2" length — Thread-In Eyepiece Extension Tube Color Filter Compatible with GSO/William Optics EarlyLumicon 2" Thread In Extension Adds 2" of back focus so your eyepiece or camera can reach sharp focus. The Lumicon 2" diameter 2" length Thread In Eyepiece Extension Tube threads into a 2" eyepiece to add up to 2" of focus extension. A compact spacer for fine tuning where your eyepiece sits in the focal path. The larger 2" clear aperture suits wide field eyepieces and large sensor imaging, where it reduces vignetting compared with a 1. 25" light path.