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Dielectric Star Diagonal 1.25" with Twist Lock
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  • Enjoy better views through your telescope with this premium diagonal featuring diffraction-limited optics and dielectric coatings
  • Provides a 90° viewing angle, perfect for more comfortable viewing through refractor and cassegrain-type telescopes
  • 58 layers of dielectric coatings provide an over 99% reflective surface, ensuring the maximum amount of light collected by the telescope reaches the eyepiece
  • Twist-lock keeps the eyepiece centered in the diagonal to provide better optical alignment
  • Accepts standard eyepieces, Barlow lenses, threaded filters, and other accessories with a 1. 25" Barrel

Ensure maximum light transmission without loss of optical quality with the Celestron Dielectric Star Diagonal, 1. 25” with Twist-Lock. Upgrade your existing star diagonal to this premium one and enjoy brighter, sharper images without replacing your telescope. This star diagonal reflects the telescope’s light path 90° to provide a more comfortable viewing angle. In addition, the glass has 58 layers of dielectric coatings, which provide an over 99% reflective surface, delivering the maximum amount of light to the eyepiece. The twist-lock eyepiece holder secures any 1. 25” eyepieces while keeping them centered in the diagonal, thus providing best opto-mechanical alignment between the telescope and eyepiece. Unlike traditional thumb screws, the twist-lock cannot scratch or engrave the barrel of your eyepieces. The twist-lock has an integrated 1. 25” barrel stop that prevents 1. 25” accessories with long barrels from damaging the mirror. All the diagonal’s mechanical parts are made of machined black anodized aluminum, except the twist lock rings, which are orange anodized for visibility. The interior of the barrel is glare threaded and painted flat black to prevent glare. With all its features and these high-end finishes, the Celestron Dielectric Star Diagonal, 1. 25” with Twist-Lock is one of the highest quality 1. 25" star diagonals that Celestron has ever offered. The key specifications for a star diagonal are its reflectivity and its optical quality. This diagonal delivers top performance in both categories, with an over 99% reflective mirror and diffraction-limited optical quality. This ensures that virtually all the light collected by the telescope will reach the eyepiece without the diagonal affecting optical performance. Using a lower quality star diagonal can both dim the view and degrade optical quality. You can enjoy better views from your telescope by simply swapping out its diagonal for a premium one, like the Celestron Dielectric Star Diagonal.

ALL ELECTRONIC ITEMS ARE 120V UNLESS OTHERWISE STATED.  WE NOTE SERIAL NUMBERS FOR ELECTRONICS AND COMPUTER PARTS

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  • You can return a product for up to 30 days from the date you purchased it.
  • Any product you return must be in the same condition you received it and in the original packaging. 
  • There may be a restock fee on any return not in original condition

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Filed under: Eyepieces & Accessories