Turn any refractor or Maksutov-Cassegrain telescope into a high-performance terrestrial spotting scope! Our new Deluxe 45-deg Correct-Image Prism Diagonal features a highly accurate, multi-coated image-erecting prism with a tight 3-arcsecond tolerance and a 27mm clear diameter. Views through the diagonal appear right-side-up and correct left-to-right, making it ideal for for daytime use with a high-power Maksutov-Cassegrain or versatile refractor telescope. Not recommended for use with Newtonian reflector telescopes.
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