Diagonals

• 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

• 1.25", 90-degree mirror diagonal features sophisticated dielectric coatings with highly efficient 99% reflectivity for peak performance
• Twist-tight clamping mechanism grips inserted eyepieces more securely than typical thumbscrew-equipped diagonals - without scratching!
• Durable dielectric mirror coatings provide higher reflectivity for maximum brightness and contrast
• Machined and anodized aluminum housing features machine-threaded glare baffles to eliminate glare for great performance
• Nosepiece barrel threaded to accept 1.25" filters

 Easily add versatility to your astronomical telescope

Great to convert your telescope for terrestrial viewing

Suitable for refractor or catadioptric reflector telescopes

See land images upright and non-mirrored

45-degree angle design for comfortable viewing

Attaches to any 1.25" eyepiece

• Fits telescopes with 1.25” focusers or visual backs, 90° viewing angle, best for observing objects overhead
• Accepts standard 1.25” eyepieces, Barlow lenses, and other accessories with a 1.25” insert barrel

• A great accessory for daytime terrestrial viewing with your telescope
• This 1.25” diagonal produces right side up and left-to-right correct images when used with refractors and catadioptric (Schmidt-Cassegrain) telescopes
• Inserts into 1.25” focusers or visual backs; accepts standard 1.25” eyepieces

• 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
• Includes a stepdown adapter, so the diagonal accepts eyepieces, Barlow lenses, threaded filters, and other accessories in both 2” and 1.25” sizes
• Two interchangeable adapters allow you to switch between a Schmidt-Cassegrain thread adapter and a 2” barrel adapter so you can use this diagonal with a wide variety of telescopes

Highest quality 2-inch Dielectric mirror diagonal with 99% reflectivity. Diagonal comes with 1.25-inch adapter and SCT adapter.

• 2” SCT mirror diagonal with high performance XLT coatings
• 1/10th wave mirror is tested with an interferometer to ensure quality
• Housing is precision machined to achieve and hold good optical alignment
• Includes a 2” to 1.25” adapter and aluminum carry case