Turn any refractor or Maksutov-Cassegrain telescope into a high-performance spotting scope! Install our high-quality Deluxe 45° Correct-Image Prism Diagonal in a telescope to have it transmit a view that’s right-side-up and correct left-to-right for optimized daytime viewing performance.

For comfortable daytime viewing of terrestrial subjects, a 45° correct-image diagonal is a necessity. Our new high quality Deluxe 45° Correct-Image Prism Diagonal features a highly accurate, multi-coated image-erecting prism with a tight 3 arcsecond optical tolerance and a 27mm clear diameter. Views through the diagonal appear right-side up and correct left-to-right, making it easy to read distant signs and accurately determine the direction of a subject’s motion. It’s ideal for use with Maksutov-Cassegrain and refractor telescopes used for terrestrial viewing.

Our Deluxe 45° Correct-Image Prism Diagonal features a 35% larger prism compared to other correct-image models, providing a wider, more pleasing field of view with correct daytime orientation. In fact, the quality, fit-and-finish, and performance level of the Orion Deluxe 45° Correct-Image Prism Diagonal rivals that of much more expensive models. Its 27mm clear aperture, multi-coated prism yields bright, high contrast views.

Not recommended for use with reflector telescopes. Weighs 5.6 oz.

Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.