William Optics 1.25" 90º Erecting Prism for Cat 51III
William Optics 1.25" 90° Erect Prism for Cat 51III
High quality erecting prism with Red anodized plate, the complete housing is made by 6061T Aluminum by CNC. This 1.25" 90 deg. erecting prism will very useful for daytime observations.
- Image erecting BAK4 prism with anti-reflection coating.
- High accuracy and high light transmission prism.
- 1.25” barrel for any 1.25” eyepieces.
- Unique design & Superior Craftsmanship
- Internally matte blackened and threaded for no internal stray light reflection.
- Entirely aluminum, red anodized.
Please note: This item is designed for the Cat 51III. This item is not compatible with the earlier Cat 51 models or the Cat 71.