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It does what it's advertised to do and helps centre stars for alignment, so well worth the investment. I put mine into a 2x Powermate to up the magnification when I do my alignments.
People over time have suggested de focusing the star and using that image to centre it in the crosshairs. That may work in eyepieces with single illuminated reticles, but in the Orion double illuminated reticle a tight, focused star is much better for centering dead centre.
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