Orders placed after 4PM on weekdays will not ship until the next business day. Orders placed after 11am Fridays will not ship until the following Monday.
Faster shipping methods may be available; just upgrade during checkout.
*Some exclusions apply.
Enter new zip code to refresh estimated delivery time.
Olivon's 90° Dielectric Star Diagonal features a dielectric multicoated optically flat mirror that virtually eliminates light loss to preserve image brightness and contrast. This star diagonal provides a more comfortable viewing position for when a refractor or Cassegrain OTA is pointed at or near the zenith, and only corrects the image horizontally. The male end fits into 2" focusers, and the prism accepts 2" eyepieces, or 1.25" eyepieces using the included adapter. A compression-ring fitting in the eyepiece holder won't mar the barrel, and a thumb screw secures it in place.