Celestron 90° Dielectric Star Diagonal with Twist-Lock (2")

Celestron 90° Dielectric Star Diagonal with Twist-Lock (2") – High-Performance Optics for Enhanced Viewing

Premium Dielectric-Coated Mirror for Maximum Light Transmission

The Celestron 90° Dielectric Star Diagonal is a high-quality accessory designed to improve the performance of your telescope by delivering brighter, sharper images with enhanced contrast. Featuring a 2-inch eyepiece holder with a 1.25-inch reducer adapter, this diagonal is compatible with a wide range of eyepieces and accessories, making it an essential addition for deep-sky observation and planetary viewing.

Built with BK7 diffraction-limited optics, the 58-layer dielectric mirror coating ensures over 99% reflectivity, allowing maximum light transmission to your eye. This is particularly beneficial for faint deep-sky objects, planetary details, and astrophotography, where every photon counts.

The twist-lock eyepiece holder eliminates the need for traditional thumbscrews, ensuring a secure, well-centred fit with perfect optical alignment. Additionally, the aluminum housing with an anodized black finish provides durability, precision, and minimal internal reflections.

Key Features & Benefits

Dielectric-Coated BK7 Mirror for Over 99% Reflectivity

• 58-layer dielectric coatings deliver superior brightness and clarity.
• Maximizes light transmission, essential for deep-sky observation and planetary detail.
• Diffraction-limited optics ensure high precision and minimal light loss.

2" Eyepiece Holder with 1.25" Reducer for Versatility

• Supports both 2” and 1.25” eyepieces for greater flexibility with accessories.
• Works with a variety of Barlows, filters, and imaging gear.

Twist-Lock Mechanism for Secure, Centered Eyepieces

• Twist-lock design eliminates the need for thumbscrews, providing a more secure grip.
• Ensures precise optical alignment for sharper, more accurate views.

Includes SCT Adapter for Secure Telescope Connection

• Compatible with both 2” drawtubes and Schmidt-Cassegrain telescope (SCT) backs.
• Provides a stable, low-profile connection for optimal performance.

Precision-Machined Anodized Aluminum Housing

• Durable construction ensures longevity and reliability.
• Flat black interior with blackened threads reduces reflections and glare.

Filter Threads on Nosepiece for Easy Compatibility

• Easily attach 2” filters directly to the diagonal for enhanced viewing.
• Ideal for reducing glare, enhancing contrast, or filtering specific wavelengths.

Specifications

• Eyepiece Compatibility: 2" & 1.25" with included reducer adapter
• Mirror Type: BK7 diffraction-limited optics
• Coatings: 58-layer dielectric with over 99% reflectivity
• Eyepiece Holder: Twist-lock design for precise alignment
• Telescope Compatibility: 2" drawtubes & standard SCT visual backs
• Housing Material: Black anodized aluminum
• Internal Finish: Flat black with blackened threads for reduced reflections
• Filter Compatibility: 2” filters (threaded on nosepiece)

What’s Included?

✔ Celestron 90° Dielectric Star Diagonal (2")
✔ 1.25” Reducer Adapter
✔ 2” Nosepiece for Standard Drawtubes
✔ Threaded SCT Adapter

Why Choose the Celestron 90° Dielectric Star Diagonal?

✔ Dielectric-coated mirror with 99% reflectivity for brighter, sharper images.
✔ Twist-lock eyepiece holder ensures secure, precise optical alignment.
✔ Versatile compatibility with both 2” and 1.25” eyepieces.
✔ Durable, lightweight anodized aluminum construction.
✔ Includes an SCT adapter for secure telescope connections.
✔ Ideal for deep-sky observations, planetary viewing, and astrophotography.

Upgrade Your Telescope’s Performance with High-Quality Optics

The Celestron 90° Dielectric Star Diagonal is a must-have accessory for serious astronomers, providing brighter, more detailed views with minimal light loss. Whether you’re observing planets, deep-sky objects, or capturing stunning astrophotography, this premium-quality diagonal ensures the best possible optical performance.