William Optics 1.25" 90° Erect Prism Diagonal
William Optics 1.25” 90° Erect Prism
This innovative William Optics 90°, 1.25" erect prism diagonal is equipped with a helical focuser barrel. The Erect Prism is a great tool that will aid observers as they voyage across the night sky with their telescopes. Not only is it a great nighttime observing tool, but it works great for daytime observations as well!
Specifications
- Prism: Image erecting BAK4 prism
- Coating: Anti-reflection
- Adjustment: Helical focuser on the top barrel
- Feature: Internally matte blackended for no internal stray light reflection
- Threaded: Internally threaded
- Compatibility: Threaded for 1.25" filters