Astro-Tech Focuser collimating ring for 10" through 16" Astro-Tech Ritchey-Chrétiens

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This Astro-Tech FCR1012 focuser collimation ring lets you fine-tune the focuser collimation of 10" through 16" Astro-Tech Ritchey-Chrétien astrographs to improve the sharpness at the corners of images taken with large 35mm-class DSLR and CCD sensors.
SKU: FCR1012