Celestron Ultima Edge 1.25" 18mm Eyepiece

Celestron Ultima Edge 18mm Eyepiece

Flat-Field Design | 65° Wide Angle | 8-Element Optics | 1.25” Barrel | Parfocal

Unlock detailed, high-power views of the Moon, planets, and deep sky treasures with the Ultima Edge 18mm Eyepiece. Part of Celestron’s premium flat-field series, this eyepiece delivers pinpoint-sharp images across the entire field of view, giving you a clearer picture with minimal distortion—edge to edge.

Precision Optics for Sharper Viewing

• 8-Element Optical Design
  Designed with a sophisticated eight-element lens layout, this eyepiece corrects for field curvature and other common optical aberrations, providing sharp, high-contrast images.

• Fully Multi-Coated Glass
  Every optical surface is fully multi-coated for improved light transmission and colour fidelity, ensuring bright, high-resolution views even at higher magnifications.

• 65° Apparent Field of View
  Offers an immersive, wide-angle view—ideal for observing lunar detail, planetary features, globular clusters, and other compact deep-sky objects.

Premium Construction and Features

• Durable, Anodised Aluminium Housing
  The body is precision-machined from high-grade aluminium with a sleek black anodised finish for durability and style.

• 1.25” Filter-Compatible Barrel
  The insert barrel is threaded to accept standard 1.25” filters and adapters, expanding your viewing options and allowing easy integration with existing accessories.

• Ergonomic Rubber Grip
  A textured rubber grip ring provides a secure hold and makes adjusting or removing the eyepiece easy—even with gloves on or in cold conditions.

Comfortable, Eyeglass-Friendly Design

• 20mm Long Eye Relief
  With generous eye relief and a soft rubber eyecup, the Ultima Edge 18mm is comfortable for both eyeglass wearers and non-eyeglass users. Perfect for extended viewing sessions.

Parfocal Convenience

• Quick Swaps, Minimal Refocus
  The 18mm model is parfocal within the Ultima Edge range—meaning you can switch between other parfocal eyepieces in the series without needing to refocus. It’s a great time-saver and makes your observing sessions smoother and more efficient.

Note: The 24mm Ultima Edge is not parfocal. Parfocality is maintained only when switching between parfocal eyepieces within the Ultima Edge series and not across other brands or lines.

Whether you're hunting for fine lunar detail or exploring Saturn’s rings, the Celestron Ultima Edge 18mm Eyepiece offers the clarity, comfort, and quality construction needed to enhance your observing experience.