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Starwave bahtinov mask for 215 260mm od
starwave bahtinov mask for 215 260mm od
Starwave bahtinov mask for 215 260mm od
Probably the quickest and easiest way to accurately focus your telescope for astro imaging bahtinov masks are an inexpensive tool which will allow you to achieve pin sharp levels of focus saving you time and improving your work simply place the mask over the front of your scope align the scope towards a star adjust the focus until a symmetrical diffraction pattern appears remove the mask and youre done elegant simple and effective an array of masks are available for telescopes of dif

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