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Orion Telescopes
Orion 1.25" Deluxe 45-degree Correct-Image Prism Diagonal
Accepted Payment
Expected Ship Date: 09/09/2024

  • Turn any refractor or Cassegrain telescope into a high-performance daytime spotting scope with our Deluxe 45-deg Correct-Image Diagonal
  • High-quality prism diagonal provides a comfortable, 45-deg viewing orientation for great daytime terrestrial views
  • Sporting a 27mm clear aperture, multi-coated prism, our Deluxe 45-deg Correct-Image Diagonal provides sharp views that are right-side-up and correct left-to-right
  • 3 arcsecond tolerance prism is 35% larger than prisms used in other models, providing a wider, more pleasing view
  • Not recommended for use with Newtonian reflector telescopes

Learn more
Item #  08754

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 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. Weighs 5.6 oz.

Diagonals are not suitable for use with Newtonian reflector telescopes due to insufficient focus travel.


Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-447-1001.


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

  • User level
  • Barrel size
  • Coatings
  • Optical quality
    Diffraction limited
  • Filter threads
  • Compression ring
  • 2"-1.25" adapter
    Sold separately
  • Weight (oz.)
  • Additional included accessories
  • Other features
  • Warranty
    One year

Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

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