The SVBONY SV190 18mm Flat-Field Eyepiece is a high-quality medium-power eyepiece designed to deliver sharp, well-corrected views across the entire field. With a 65° apparent field of view, generous 20mm eye relief, and a true flat-field optical design, it is ideal for lunar observing, open clusters, and a wide range of deep-sky objects.

• Flat-field optical design – corrected field curvature keeps stars sharp from centre to edge
• 65° apparent field of view for an immersive yet controlled visual experience
• 8 elements in 5 groups for high image fidelity and contrast
• Fully multi-coated optics with blackened lens edges to suppress reflections
• 20mm eye relief suitable for eyeglass wearers
• Fold-up rubber eyecup with removable section exposing an M42 × 0.75 thread

Sharp, Corrected Views Across the Field

Unlike simple wide-angle eyepieces, the SV190 uses a true flat-field design to control field curvature, keeping stars tight and well defined right to the edge. This is especially noticeable when observing rich star fields and extended deep-sky objects, where edge sharpness greatly improves the overall experience.

Comfortable Viewing with Long Eye Relief

With a generous 20mm eye relief and a soft fold-up rubber eyecup, the SV190 remains comfortable during long observing sessions. It can be used comfortably with or without glasses, making it well suited to outreach events or shared observing setups.

Astrophotography-Ready Eyepiece

Removing the eyecup reveals an M42 × 0.75 thread, allowing basic afocal or eyepiece-projection astrophotography. This gives the SV190 additional flexibility for observers who want to experiment with imaging without dedicated camera adapters.

At a Glance

Note: Actual magnification and exit pupil depend on your telescope’s focal length and f-ratio.