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Black 2-inch 90-degree mirror diagonal with XLT coating in aluminum case

Celestron

Celestron 93527 2-Inch 90-Degree Mirror Diagonal XLT Coating

SKU CH-GSQS-PMY7K

A 90-degree mirror diagonal with 2-inch barrel and XLT coatings directs light at a right angle for comfortable viewing

  • Accessory90-Degree Mirror Diagonal
  • Product typeTelescopes
  • Product colorBlack
  • Key featuresThe Celestron 2 in Mirror Diagonal was built for superior pe
  • Interferometer-tested 10th wave flat mirror guarantees precision
  • StarBright XLT multi-coatings maximise light transmission for bright images
  • 2-inch barrel accepts wide-field eyepieces for expansive views
  • 90-degree angle provides comfortable viewing position
  • Robust aluminium case protects the diagonal during transport

Purpose & audience

The Celestron 93527 is a 2-inch 90-degree mirror diagonal with StarBright XLT coating for Schmidt-Cassegrain telescopes. It serves visual observers who want a wider field of view through 2-inch eyepieces. Interferometer-tested 10th wave flat mirror precision targets serious astronomers and hobbyists seeking high image fidelity. The robust aluminum carrying case protects the optic during transport.

Sustained optical behaviour

Multi-coated optics with StarBright XLT coating maintain maximum light transmission across extended observing sessions. The 10th wave flat mirror preserves wavefront accuracy so planetary and deep-sky detail remains crisp without degradation over time. A 90-degree angle provides comfortable viewing geometry for long periods at the eyepiece. The 2-inch barrel accepts large-format eyepieces for expansive low-power fields.

Installation & common issues

The diagonal slides into the telescope's visual back and accepts 2-inch eyepieces with a standard compression ring or set screw. Ensure the visual back and diagonal barrels are clean to avoid marring the coated surfaces. Overtightening the eyepiece lock can stress the mirror cell; snug is sufficient. The aluminum case adds bulk, so verify storage space in your accessory box.

How it compares

Measured against everything we stock in Binoculars, Scopes & Sights, at today’s prices. Recalculated every night.

Price $153.99
Pricier than about 61% of the 1,401 comparable items (median $93.99).

Specifications

Product
Brand nameCELESTRON
Model name93527
Product typeTelescopes
Product colorBlack
In the box
Accessory90-Degree Mirror Diagonal

Questions about this item

Does the 10th wave flat mirror in the 93527 stay stable during long observing sessions?

The interferometer-tested 10th wave flat mirror maintains precision alignment, so image quality remains consistent even after hours of use.

What telescope fitting does the 93527 require to attach properly?

The diagonal is designed for Schmidt-Cassegrain telescopes and accepts 2-inch eyepieces directly.

Can the 93527 be used on a refractor that takes 2-inch diagonals?

The 93527 is built for Schmidt-Cassegrain telescopes; its mounting and optical path are matched to that design.

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