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Holiday Special Ioptron 1.25" Dielectic Star Diagonal Save Big: 90% Off [5NDLgXTo]

$26.99 $86.99 -69%

iOptron 1.25" Dielectric Star Diagonal Elevate your telescope's performance with the iOptron 1.25" Dielectric Star Diagonal. This premium accessory is designed for refractor and catadioptric telescopes that accept standard 1.25" accessories, providin

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Holiday Special Ioptron 1.25" Dielectic Star Diagonal Save Big: 90% Off [5NDLgXTo]

iOptron 1.25" Dielectric Star Diagonal

Elevate your telescope's performance with the iOptron 1.25" Dielectric Star Diagonal. This premium accessory is designed for refractor and catadioptric telescopes that accept standard 1.25" accessories, providing an essential upgrade. The diagonal boasts multi-layer dielectric mirror coatings that deliver high reflectivity (up to 99%), resulting in sharper contrast and excellent color fidelity across the entire visible spectrum. This precision-engineered diagonal ensures your telescope delivers clear, bright images, free from distortion or degradation, whether you're observing planets, double stars, or deep-sky objects.

High-Performance Optics and Durability

At the core of this diagonal is a precision-polished mirror coated with multiple dielectric layers, known for their durability and resistance to tarnishing and scratching. Unlike traditional aluminum or silver coatings, dielectric coatings maintain their quality over time, providing years of consistent performance. This feature is particularly beneficial for observing subtle features on celestial bodies, as it enhances light transmission and detail. The diagonal's CNC-machined aluminum body and brass compression ring design offer both durability and lightweight construction, ensuring a secure fit for your eyepieces and accessories. Additionally, the 1.25" nosepiece with removable barrel and filter threads allows for the use of your preferred color or light pollution filters without altering the diagonal setup.

Perfect for Visual Observing

The iOptron 1.25" Dielectric Star Diagonal is an ideal companion for any telescope equipped with a 1.25" focuser or visual back. Its 90° viewing angle is perfect for high-altitude targets or comfortable seated observing, making it an excellent choice for astronomers of all levels. This diagonal is compatible with refractors, Schmidt-Cassegrain telescopes, Maksutov-Cassegrains, and short-tube scopes, providing versatility for various observing needs. With its included accessories, such as dust caps, brass compression ring, filter-threaded nosepiece, and boxed packaging, the iOptron Dielectric Star Diagonal is a complete solution for enhancing your telescope's visual performance. Upgrade your observing experience today and witness the difference this exceptional diagonal can make in your observations.

What Our Customers Say

January 16, 2026

Absolutely no complaints!

An outstanding item with a great build.

- Nelson N..

January 16, 2026

Absolutely no complaints!

A great product that is very clever.

- Teyrnon G..

January 16, 2026

Absolutely no complaints!

It’s a very solid and useful gadget.

- Ysbaddaden Y..

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