Skip to content
Due to the USA–China tariff escalation, we will temporarily not receive additional inventory for Celestron and Sky-Watcher products. As a result, we are unable to accept orders for any out-of-stock items and encourage you to take advantage of the products currently in stock while supplies last.
Due to the USA–China tariff escalation, we will temporarily not receive additional inventory for Celestron and Sky-Watcher products. As a result, we are unable to accept orders for any out-of-stock items and encourage you to take advantage of the products currently in stock while supplies last.

Features

  • 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

Celestron 2" Mirror Diagonal with XLT Coatings

There are few telescope accessories that work as hard or matter as much as a diagonal! An integral part of the optical chain, a good diagonal can make a big difference in the quality of the image you see. A 2" diagonal is required if you want to use 2" eyepieces when observing with your telescope. The larger 2" barrel allows you to see a bigger percentage of the telescope’s light cone, which works wonders for capturing faint deep sky objects with low surface brightness.

The Celestron 2" Mirror Diagonal was built for superior performance. The housing is machined with precision instruments to make sure the optics stay perfectly aligned. The diagonal’s mirror is tested with an interferometer, and is guaranteed to be 1/10 wave or better. The mirror’s surface is covered with the same high performance XLT coatings used on Celestron’s best telescopes, and the result is a sharp, bright image that will satisfy the most discriminating amateur astronomer.

This 2" diagonal threads securely to the rear cell of standard Schmidt-Cassegrain telescopes. To take advantage of the XLT Diagonal’s extra light throughput, insert a 2" eyepiece into the barrel. If you want to use 1.25" eyepieces, slide the included 2" to 1.25" adapter into the eyepiece barrel and secure it with the thumbscrew. When you’re not observing, store your diagonal in the included aluminum case for protection.

You may also like

  • $249.95 USD - $249.95 USD
    $249.95 USD
    $249.95 USD - $249.95 USD
    $249.95 USD

    Celestron Dielectric Star Diagonal with Twist-Lock - 2"

    CEL-93573
    Only 3 left!

    Features Enjoy better views through your telescope with this premium diagonal featuring diffraction-limited optics and dielectric coatings Provides...

    View full details
    $249.95 USD - $249.95 USD
    $249.95 USD
    $249.95 USD - $249.95 USD
    $249.95 USD
  • $1,899.95 USD - $1,899.95 USD
    $1,899.95 USD
    $1,899.95 USD - $1,899.95 USD
    $1,899.95 USD

    Celestron C9.25 OTA - CGE Dovetail

    CEL-91027-XLT
    Only 1 left!

    Features 9.25" Schmidt-Cassegrain Optical Tube Assembly (OTA) Features Celestron's premium patented StarBright XLT optical coatings 2350mm focal ...

    View full details
    $1,899.95 USD - $1,899.95 USD
    $1,899.95 USD
    $1,899.95 USD - $1,899.95 USD
    $1,899.95 USD
  • $55.00 USD - $55.00 USD
    $55.00 USD
    $55.00 USD - $55.00 USD
    $55.00 USD

    Baader 2" Locking Ring for SCTs 8"/9.25"/11"/14"

    BAA-2458270

    Allows direct connection of Baader 2" Zenith Prisms and mirrors to Schmidt-Cassegrain telescopes. For Celestron SCTs 8/9.25/11/14 with female 2" t...

    View full details
    $55.00 USD - $55.00 USD
    $55.00 USD
    $55.00 USD - $55.00 USD
    $55.00 USD
  • $299.00 USD - $299.00 USD
    $299.00 USD
    $299.00 USD - $299.00 USD
    $299.00 USD

    Baader Mirror Diagonal w/ BBHS Coating - T-2

    BAA-2456103

    T-2 BBHS star diagonal withT-2 threads for compatibility with all Baader's Astro T2 system of parts Provides high reflectance over a wide spectral...

    View full details
    $299.00 USD - $299.00 USD
    $299.00 USD
    $299.00 USD - $299.00 USD
    $299.00 USD
  • $37.00 USD - $37.00 USD
    $37.00 USD
    $37.00 USD - $37.00 USD
    $37.00 USD

    Baader 2"/2" Inverter Ring w/ 48mm Filter Thread

    BAA-1508020
    1 in stock

    Converts 2" female into 2" male thread Internal M48 Filter thread for 2" filter Can be used to connect Baader Hyperion Mark III Zoom directly to a...

    View full details
    $37.00 USD - $37.00 USD
    $37.00 USD
    $37.00 USD - $37.00 USD
    $37.00 USD