Sky Rover UF 30 mm Ultra Flat Field Eyepiece
Designed for Immersive Wide-Field Viewing
The UF 30 mm Ultra Flat Field Eyepiece from Sky Rover is the longest focal-length model in the line, designed for observers who value expansive fields and relaxed viewing. With a 70° apparent field of view, flat-field optics, and robust mechanical design, it delivers edge-to-edge clarity whether you’re scanning star fields or studying deep-sky objects through large binoculars or premium telescopes.
Precision Optics in a Wide Format
This eyepiece uses a high-performance optical layout: 9 elements in 5 groups, fully multi-coated to boost light transmission and contrast. The field stop is 38 mm, and the design supports a 70° apparent field—remarkably wide for its focal length. With an eye relief of 22 mm, it accommodates most eyeglass wearers, and the fold-down rubber eye cup enhances comfort while blocking stray light.
Mechanical Design and Practicality
The interface is a generous 2-inch barrel, with filter thread at the object end to accept M48×0.75 filters or accessories. A removable cap reveals an optional M45×0.75 thread for additional attachments such as projection accessories or astigmatism correctors. At approximately 550 g in net weight and sized about 75 mm by 54 mm (length × diameter), the eyepiece strikes a balance between substantial build and field usability.
Under the Night Sky
In use, the UF 30 mm opens large regions of the sky while retaining crispness to the edge. Clusters span the field beautifully, nebulae appear expansive, and sweeping Milky Way segments feel immersive. The combination of long focal length and wide field means you’ll enjoy a lower power view with high comfort—ideal for large binocular systems as well as premium refractors.
Observer Insights
Observers accustomed to flat-field eyepieces report that once they experience the sharpness of a well-designed flat field, they notice the difference immediately at the edge of the field. In fast telescopes or binocular systems, curvature and edge softness vanish. The UF 30 mm is frequently noted for its ability to deliver that quality in a wide-field format.
Observing Tip
Start your session with the rubber eyecup down if you wear glasses; if you do not, keep the eyecup up to get optimal eye-placement. Use the eyepiece’s full field to sweep large star clusters or faint nebulae at lower magnification, then pair it with higher-power eyepieces for detailed work. With large binocular systems, this 30 mm gives a comfortable wide-field view before transitioning to smaller focal-length eyepieces for detail work.
Final Thoughts
The Sky Rover UF 30 mm Ultra Flat Field Eyepiece combines the allure of a wide field with the precision of a flat-field design. Its mechanical refinement, generous barrel format, and optical performance make it a standout choice in its class. Whether used in large binoculars or premium telescopes, it invites you to explore wide horizons with clarity and comfort.
