SVBONY SV188P 1.25″ 90° Dielectric Diagonal for Refractor Telescopes

The SVBONY SV188P is a 1.25″ dielectric mirror diagonal designed for refractor and Cassegrain-style telescopes. Featuring high-reflectivity dielectric coatings and precision mechanical construction, it delivers bright, high-contrast views while improving viewing comfort during extended observing sessions.

High-Reflectivity Dielectric Mirror

The dielectric-coated mirror provides over 99% reflectivity, minimising light loss and helping preserve brightness and contrast when observing the Moon, planets, and deep-sky objects.

Standard 1.25″ Compatibility

A 1.25″ nosepiece fits standard 1.25″ focusers and accepts 1.25″ eyepieces, filters, Barlow lenses, and other accessories with a 1.25″ barrel, making it compatible with a wide range of telescope setups.

Comfortable 90° Viewing Angle

The 90-degree design provides a more comfortable observing position when viewing objects high in the sky, reducing neck and back strain during long sessions.

Corrected Image Orientation

The diagonal produces an upright but laterally reversed image, similar to a mirror view. This orientation is well suited to astronomical observing, where image orientation is not critical.

Brass Compression Ring

A brass compression ring securely holds eyepieces and adapters while helping prevent scratching or marring of accessory barrels, ensuring both stability and long-term protection.

Installed on Telescope

Designed for easy installation, the SV188P integrates smoothly into refractor and Cassegrain telescope systems, making it a practical upgrade for both visual observers and imaging setups.