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Features: The spider hub and holder assemblies are made of carbon composite, which significantly reduces the weight. The spider vanes are steel for maximum strength and keeps the thickness to a minimum. Our 3-vane spider design has 1/4 less total diffraction compared to 4-vane models. Bright field objects will appear to have six diffraction spikes spaced at 60° intervals, but the spikes are half as bright compared to a 4-vane spider (see diffraction comparison). The 3-vane mounts feature the same simplified collimation as the 4-vane models. Made in the U.S.A. |
3-vane secondary mounts for common English sized mirrors Spiders are custom-made for your tube's inside diameter. Provide the information described on the ordering information page. Don't see your mirror size? Contact us and we can supply a custom-sized holder for no extra charge. No more gluing mirrors!
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Protostar P.O. Box 368 New Albany, Ohio 43054 U.S.A. 614-375-3146
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