Orion Twist-Tight Dielectric Mirror Star Diagonal

Unlike traditional thumbscrews that press a single point against your eyepiece barrel, the twist-tight collar uses a compression ring to apply even pressure around the entire circumference. This centers the eyepiece perfectly and eliminates the risk of marring or scratching your equipment.

Yes. While the diagonal features a 2-inch barrel, it includes a step-down adapter that allows you to securely use your 1.25-inch eyepieces without any compatibility issues.

Dielectric coatings are significantly more durable and offer 99% reflectivity, which is higher than standard aluminum coatings. This results in noticeably brighter, higher-contrast views, especially when observing faint deep-sky objects.

It is designed specifically for refractor and Cassegrain telescopes. It is not suitable for Newtonian reflector telescopes, which typically require a different optical path design.

Yes, the internal baffles are crucial for reducing stray light reflections inside the housing. By minimizing this glare, you get a darker background sky, which helps improve the overall contrast of your observations.