Celestron Ultima Edge 10mm 1.25" Eyepiece
Flat-field performance and high-power precision in a compact, premium design
If you're looking for a high-magnification eyepiece that delivers pinpoint stars and sharp contrast across the entire field, the Celestron Ultima Edge 10mm 1.25" eyepiece is a strong contender. Part of Celestron's Ultima Edge line, this 10mm model is optimized for flat-field performance and excellent correction in fast optical systems.
High-power performance with a flat, usable field
The 10mm focal length is ideal for high magnification views of the Moon, planets, tight double stars, and small deep-sky objects like planetary nebulae. Unlike many short focal length eyepieces that show visible field curvature—especially in fast refractors or SCTs—the Ultima Edge 10mm keeps the entire 60° apparent field sharp and focused thanks to its built-in field flattener. Stars stay tight all the way to the edge, letting you make full use of the field without constantly refocusing.
Advanced optical design for clarity and contrast
This eyepiece features an 8-element, 5-group optical layout that incorporates fully multi-coated lenses and Celestron’s proprietary XLT coatings to enhance light transmission and image brightness. Internal baffling and blackened lens edges suppress glare and internal reflections, improving contrast and making subtle planetary detail stand out even in less-than-ideal seeing. If you're chasing atmospheric features on Jupiter or fine detail on the lunar surface, the Ultima Edge 10mm will help bring them into sharp relief.
Comfortable eye relief and solid construction
With 16mm of eye relief, the Ultima Edge 10mm offers a comfortable viewing experience, even for eyeglass wearers. A soft rubber eyecup folds down easily to accommodate glasses without reducing the field of view. The 1.25" barrel is threaded for standard filters and machined to fit snugly in your diagonal or focuser. A rubberized grip ring adds a secure, tactile feel, making it easy to swap eyepieces in the dark or while wearing gloves.
A premium upgrade for serious planetary observers
Whether you're pushing your telescope to its resolution limits on the Moon or trying to split a difficult double star, the Ultima Edge 10mm offers premium optical quality and thoughtful construction in a compact, easy-to-use package. It’s a strong step up from simpler designs like Plössls or budget widefields, delivering crisp views across the entire field without sacrificing eye relief or comfort.
Specifications:
-
Focal Length: 10mm
-
Barrel Size: 1.25"
-
Apparent Field of View: 60°
-
Eye Relief: 16mm
-
Optical Design: 8 elements in 5 groups with field flattener
-
Coatings: Fully multi-coated with XLT coatings
-
Filter Compatibility: Accepts standard 1.25" filters
-
Eyecup: Soft rubber, fold-down
-
Weight: Approximately 6.7 oz
If you're building out your high-power eyepiece options and want something that performs cleanly in a wide range of scopes, the Celestron Ultima Edge 10mm deserves a spot in your kit. It offers excellent correction, modern coatings, and a flat, wide field that’s a pleasure to use night after night.
