Celestron 1.25" Dielectric Mirror Diagonal with Twist Lock

Celestron 1.25" Dielectric Mirror Diagonal with Twist Lock

The Celestron 1.25" Dielectric Mirror Diagonal with Twist Lock is a premium upgrade for refractor and catadioptric telescopes, delivering brighter, sharper, and high-contrast views. Designed with advanced dielectric coatings and precision engineering, this diagonal ensures maximum light transmission while providing a comfortable 90° viewing angle for extended observing sessions.

Key Features

High Reflectivity Mirror – Enhanced with 58 layers of dielectric coatings for over 99% reflectivity, ensuring superior brightness and contrast.

Twist-Lock Eyepiece Holder – Securely centers 1.25" eyepieces without scratches, improving alignment between telescope and eyepiece.

Premium Build Quality – Machined black anodized aluminum body with glare-threaded, flat-black interior for reduced reflections.

Durability & Protection – Built-in 1.25" barrel stop prevents long eyepiece barrels from contacting or damaging the mirror.

Enhanced Viewing Comfort – Provides a 90° light path redirection, making astronomy sessions more ergonomic.

Optical Precision – Diffraction-limited quality ensures no loss of sharpness compared to your telescope’s native optics.

Why Choose a Dielectric Diagonal?

Standard diagonals can reduce brightness and compromise image clarity. The dielectric mirror design of this diagonal delivers virtually loss-free light transmission, giving you the clearest possible views of the Moon, planets, and deep-sky objects without upgrading your entire telescope