Celestron 2 Inch Mirror Diagonal with XLT Coatings for Schmidt-Cassegrain Telescopes

Item #CELE169-1

  • List Price:
  • $149.95
  • Your Price:
  • $119.98
  • You Save:
  • $29.97 USD20% + FREE Shipping
  • 2" diagonal for Schmidt-Cassegrain telescopes
  • Celestron's high performance XLT optical coatings for maximum light transmission
  • Interferometer tested 10th wave flat mirror
  • All machined housings for accurate optical alignment
  • Includes aluminum case for storage and protection and 1.25" eyepiece adapter
Questions? Let our experts help!
  • Description

    Experience wider, brighter, and more detailed views of the night sky from your existing Schmidt-Cassegrain telescope by adding this high-quality 2" telescope diagonal from Celestron. Upgrading your diagonal and switching to 2" eyepieces is one of the best investments you can make in your telescope. The wider diagonal captures more of the telescope's light cone, perfect for viewing faint, deep sky objects like nebulae and galaxies.

    This 2" telescope diagonal stands out from the competition thanks to its XLT optical coatings. Celestron applies the same high-reflectivity coatings to this diagonal that you'll find on their top-of-the-line telescopes. The result is light transmission levels of 96 percent. This instrument is precision machined and tested on an interferometer to ensure a 1/10th wave flat mirror.

    Although it's an ideal match for Celestron Schmidt-Cassegrain telescopes (SCTs), this diagonal threads securely onto any SCT.

    This diagonal comes with a 1.25" adapter so you can seamlessly switch between 2" and 1.25" eyepieces during your observing session. It also includes a hard-sided alumnium carrying case to protect it when not in use.


    Supplier SKU


    Shipping Restrictions

    Available for shipment to the USA and Canada only.

  • Dimensions & Specifications

    Telescope Accessories Series

    Celestron Optical Accessories



    International Shipping


  • Product Guarantee

    We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

    Manufacturer Warranty

    Celestron warrants all of its products to be free from defects in materials or worksmanship. Celestron offers a limited lifetime warranty for binoculars and spotting scopes. All other products have a 2-year manufacturer's warranty, which covers repairs or replacement in cases of defective components. If you have specific questions about this product's warranty, please contact Celestron's customer service department at 310-328-9560.

    Return & Exchange Policy

    At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

Customer Q&A

1 - 5 of 12
1 2
  • Q1: Does the "Celestron 2" diagonal with XLT Coatings for SCT Telescopes" come with a 1 1/4" adapter? Thank you. David Willard


    Yes, this includes the 1.25 inch eyepiece adapter

  • Q2: Is this diagonal what I would need to use 2\ eyepieces with my C9.25?"

    A: Yes, the Celestron 2-Inch Diagonal will allow you to use 2-inch eyepieces.

1 - 5 of 12
1 2

Ask The Experts

Have questions about an item or need advice on selecting the right astronomy gear? Our team of telescope experts is here to help! Avid amateur astronomers themselves, they've tested products in the field and can provide personalized recommendations.

You can reach our Customer Support line at 1-800-303-5873. We're open 8 a.m. to 8 p.m. Central Time, Monday through Friday and 9 a.m. to 4 p.m. on Saturday.

After hours? Drop us an email at info@telescopesplus.com. We'll get back to you as soon as possible, usually within 1 business day.