We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
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

  • TypeTelescopes
  • Accessory90-Degree Mirror Diagonal
  • ColorBlack
  • FeaturesThe Celestron 2" Mirror Diagonal was built for superior perf
  • 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.

Highlights

  • 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

Specifications

BrandCELESTRON
Model93527
TypeTelescopes
Accessory90-Degree Mirror Diagonal
ColorBlack
FeaturesThe Celestron 2" Mirror Diagonal was built for superior performance. An integral part of the optical chain, a good diagonal can make a big difference in the quality of the image you see. There are few telescope accessories that work as hard or matter as much as a diagonal!. 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 fain...

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.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.