Celestron Ultima Edge – 15mm Flat Field Eyepiece (1.25″)

Celestron Ultima Edge – 15mm Flat Field Eyepiece (1.25″)

Premium wide-field, high-clarity eyepiece for immersive planetary & deep-sky observing

The Ultima Edge 15mm Flat Field Eyepiece is a high-performance Ultra Flat Field (UFF), parfocal eyepiece designed for astronomers who demand pinpoint-sharp stars, excellent contrast, and edge-to-edge clarity. Featuring a sophisticated 8-element optical design, fully multi-coated lenses, and a generous 65° apparent field of view, this eyepiece delivers breathtaking views of the Moon, planets, star clusters, nebulae, and galaxies.

Available from Modern Telescopes – India’s largest telescope network, the Ultima Edge 15mm is perfectly suited for Newtonian reflectors, Dobsonians, refractors, Schmidt-Cassegrains (SCTs), and Maksutov telescopes equipped with standard 1.25″ focusers or star diagonals.

🌌 Ultra-Flat, Edge-to-Edge Performance

Designed to “see the whole picture,” Ultima Edge eyepieces provide a uniformly sharp and flat image from the center right to the field edge—dramatically reducing field curvature and distortion compared to conventional eyepieces.

• 15mm focal length offers versatile medium-to-high power magnification

• Wide 65° apparent field of view for immersive, space-walk-style observing

• Ideal for lunar detail, planetary observing, globular clusters, and compact deep-sky objects

🔭 Advanced Optical Design for Maximum Light Transmission

• 8 lens elements in 5 groups with proprietary optical design

• Fully multi-coated optics for superior brightness, contrast, and color fidelity

• Excellent performance across fast and slow telescope optics

• Optimized for both visual astronomy and observational precision

👓 Comfortable Viewing for Long Observing Sessions

The Ultima Edge 15mm is designed with observer comfort in mind:

• Generous 16mm eye relief – comfortable for eyeglass and non-eyeglass wearers

• Fold-down rubber eyeguard for flexible eye positioning

• Wide field without eye strain, even during extended viewing sessions

🛠 Precision-Machined Body & Universal Compatibility

Crafted from high-grade aluminum with a black anodized finish, this eyepiece is both durable and elegant. A molded rubber grip ring ensures secure, non-slip handling—even during cold or gloved observing nights.

• 1.25″ (31.75mm) barrel fits all standard 1.25″ focusers and diagonals

• Internally threaded barrel accepts standard 1.25″ filters (M28.5 x 0.6)

• Lightweight yet robust for perfect telescope balance

🔄 Convenient Parfocal Design

Spend less time refocusing and more time observing. The Ultima Edge series is parfocal, allowing you to swap between Ultima Edge eyepieces with minimal or no refocusing, making your observing sessions smoother and more efficient.

Note: The Ultima Edge 24mm is not parfocal. Parfocality applies only within the Ultima Edge line and not with eyepieces from other brands or series.

📐 Technical Specifications

• Focal Length: 15mm

• Barrel Diameter: 1.25″ (31.75mm)

• Eyepiece Type: Wide-Field Flat Field

• Apparent Field of View: 65°

• Field Stop Diameter: 19.6mm

• Optical Design: Proprietary

• Lens Elements / Groups: 8 / 5

• Optical Coatings: Fully Multi-Coated

• Eye Relief: 16mm

• Parfocal: Yes (within Ultima Edge line)

• Filter Threads: 1.25″ (M28.5 x 0.6)

• Eye Guard: Fold-down rubber

• Body Material: Aluminum

• Weight: 5.18 oz (147g)

• Dimensions: 70 × 45 × 45 mm

⭐ Why Buy from Modern Telescopes?

✔ India’s largest and most trusted telescope & astronomy accessories store
✔ Authorized source for genuine Celestron eyepieces
✔ Expert guidance for beginners and advanced astronomers
✔ Nationwide delivery with reliable after-sales support