Sky-Watcher 2" Dielectric 90° Star Diagonal with 1.25" Adaptor

The Sky-Watcher 2" Dielectric 90° Star Diagonal is a premium accessory designed to deliver brighter, higher-contrast views through your telescope. With its high-grade dielectric mirror coatings and solid construction, it’s an excellent upgrade for observers who want to get the very best performance from their optics.

Ideal for refractors, Schmidt-Cassegrain and Maksutov telescopes with a 2" focuser or visual back, this diagonal provides a comfortable 90° viewing position, making it easier to observe objects high in the sky.

Brighter, sharper visual performance

Unlike standard mirror diagonals, the dielectric-coated mirror offers extremely high reflectivity with superb durability. This results in:

• Excellent light transmission

• Increased image brightness

• Improved contrast and clarity

• Long-lasting optical performance

Dual-format versatility

This diagonal includes a 1.25" adaptor, allowing you to use both 2" and 1.25" eyepieces with the same setup — ideal if you have a mixed eyepiece collection.

Key features

• Model: Dielectric Star Diagonal

• Viewing position: 90°

• Format: 2" diagonal with 1.25" adaptor

• Coatings: Premium dielectric, ultra-reflective multi-coating

• Designed to maximise light intensity and deliver bright, high-contrast images

The Sky-Watcher 2" Dielectric 90° Star Diagonal is a high-quality upgrade that enhances visual performance while adding flexibility to your observing setup — a great choice for anyone looking to step up from a standard diagonal.