Di-electric Coated 90º Star Diagonal 2"

Sky-Watcher Di-electric Coated 90º Star Diagonal 1.25" is available in either 1.25" or 2" sizes.

The mirrors inside these diagonals have undergone a special high-reflectivity multi-coating process, allowing them to reflect 99% of the precious gathered starlight, providing exceptional brightness and contrast.  

(Standard diagonals typically reflect 90-95% of light).