Our highest-quality 2" Orion Dielectric Mirror Star Diagonals feature sophisticated, lab-tested dielectric coatings that boast an astounding 99% reflectivity. Dielectric coatings are more durable than enhanced aluminum coatings, so you'll enjoy years of exceptional performance. The machined and anodized aluminum housing features machine-threaded baffles for high contrast and a nonmarring compression ring collar for securing the eyepiece. The 2" model has a 1.25" adapter to accept 1.25" telescope eyepieces. Nosepiece barrel is threaded to accept filters. Endcaps included.

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