The 20mm Omegon eyepiece from the SWA series is designed for observers who want to see a large portion of the sky in one field of view. With a wide 70° field of view, this eyepiece provides a spacious and comfortable view, perfect for observing open star clusters, nebulae, and the moon in context.
The optical construction consists of five carefully positioned lens elements in three groups. Thanks to full multi-coating and blackened lens edges, the eyepiece offers high contrast with minimal reflections. The rubber exterior provides grip, while the continuously adjustable eye cup allows eyeglass wearers to utilize the entire field of view.
All eyepieces in the SWA series are parfocal: when switching between them, minimal refocusing is needed, which is convenient during observation sessions.
Key Features
- 20mm eyepiece with 70° wide-angle view
- Ideal for wide deep-sky observations and lunar surface
- Five lenses in three groups for sharp and steady images
- Multi-coating and internal baffling for high contrast
- Parfocal within the SWA series
- Continuously adjustable eye cup, suitable for eyeglass wearers
Specifications
- Focal length: 20 mm
- Barrel: 1.25″
- Apparent field of view: 70°
- Optical design: 5 elements in 3 groups
- Full multi-coating
- Filter thread: yes
- Parfocal: yes
- Adjustable eye cup: yes
Application
The 20mm eyepiece is particularly suitable for telescopes with short and medium focal lengths. It provides a wide and steady view that’s ideal for deep-sky objects such as open star clusters, but can also be used for the moon and larger planetary disks.
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