*Telescope-side thread size for the F060HNR is M61 x 1mm (male)
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If you like helical focusers you are going to love this! It is smooth and accurate. The service from Stellarvue is top notch! I needed an adapter and they sent it fast. I have been using the 60MM RACI finder for the last two years and it is much better than a 50MM for finding those faint fuzzies. This helical focused makes it possible to use it straight or as a guide scope or a widefield lens. A must have if you own the 60mm. Well worth the price.