You hate reversed views of your star diagonal but no prism will do it for you?

This new 2" 90 deg. erecting prism by William Optics is our reply to your needs! High quality prism, coating and finish, for good correct-image views of celestial objects. Perfect for daytime observations. Will turn your refractor into a 24/7 friend! This prism is particularly suitable for astronomical usage.

Precision Prism
• Image erecting BaK4 prism with anti-reflection coating.
• Fully multi-coated.
• Minimized light loss and high accuracy to make possible critical night-time observations.

Superior Craftsmanship
• Internally matte blackened and threaded for no internal stray light reflection.
• Threaded for 2" filters.

Ready to Go
• 1.25" adapter with brass compression ring included in the price.
• Large, chromed thumbscrews.

Beautiful Finish
• Entirely aluminum, black anodized.
• Silver sandblast finish with William Optics logo laser engraved.