The Sky Rover Optics UWA 4 mm eyepiece belongs to the second-generation UWA (Ultra Wide Angle) series and offers a wide 82° apparent field of view for an immersive observing experience. The updated version features slight adjustments to the optical system and a redesigned mechanical structure. The slimmer body and stainless steel barrel improve durability and ergonomics.

This eyepiece is designed for high-magnification observations and performs well when observing planets, the Moon, and bright deep-sky objects. The optical design consists of 7 elements in 4 groups and uses fully multi-coated (FMC) optics to enhance light transmission. Blackened lens edges and a matte internal structure reduce stray light and improve contrast. A foldable silicone eyecup increases observing comfort.

Key features

• UWA (Ultra Wide Angle) series eyepiece
• wide 82° apparent field of view
• 4 mm focal length suitable for very high magnification observations
• optical design with 7 elements in 4 groups
• fully multi-coated (FMC) anti-reflection coatings
• blackened lens edges to reduce stray light
• matte internal surfaces to improve contrast
• slimmer body with stainless steel barrel
• foldable silicone eyecup for improved comfort
• standard 1.25" barrel

Kit contents

• Sky Rover Optics UWA 4 mm eyepiece
• dust caps

Technical specifications

• manufacturer: Sky Rover Optics
• model: UWA 4 mm
• focal length: 4 mm
• apparent field of view: 82°
• eye relief: 12 mm
• field stop: 5.6 mm
• optical design: 7 elements in 4 groups
• coatings: Fully Multi-Coated (FMC)
• barrel size: 1.25"
• weight: 185 g
• SKU: 21820