Eye relief: 20mm
Insertion diameter: 31.7mm
Apparent field of view: 50 degrees
Focal length: 15mm
Weight: 163g
[Product Highlights & Recommended Points]
- Focal Length 15mm: Easy to use as a medium-power eyepiece, offering an appropriate magnification for observing the Moon and planets, as well as slightly wider targets like nebulae and star clusters. Its versatility shines when combined with various telescope focal lengths.
- Apparent Field of View 50°: Provides a wide apparent field of view of 50 degrees, designed to reduce blurring at the edges and minimize eye fatigue. Creates an immersive experience that wraps the viewer in the starry sky.
- Eye Relief 20mm: Allows easy viewing even when the eye is positioned away from the eyepiece, making it friendly for eyeglass users. Comfortable for extended observation sessions with minimal eye strain.
- High-Quality Lanthanum Glass: Reduces chromatic aberration and delivers high-contrast, sharp images. Enables clearer observation of faint stars and fine details.
- Fully Multi-Coated: Minimizes reflections and ghosting on lens surfaces while increasing light transmission, enhancing the visibility of dark areas. Dim light sources like stars appear crisp and clear.
- Twist-Up Eyecup: Can be rotated up or down for adjustment. Designed for comfortable viewing with or without glasses, and helps block stray light from the periphery.
- 1.25-inch (31.7mm) Barrel Diameter: Standard size compatible with most telescopes and accessories. Makes it easy to attach commonly available filters.
- Lens Construction 7 Elements in 4 Groups: Provides optical balance, maintaining sharpness and good edge performance while reducing distortion and aberrations. Comparable to high-end eyepieces.
- Robust Metal Body + Anti-Roll Design: Strong and easy to handle during outdoor use. Provides a secure grip that is resistant to slipping and easy to rotate.
- Balanced Weight & Portability: Weighs approximately 163–168g, striking a balance between stability, quality, and ease of handling—not too light, not too heavy.
[Summary]
The SLV Series 15mm eyepiece is a high-end medium-power lens that combines sharpness, wide field of view, and ease of use. Its 20mm eye relief, lanthanum glass, and multi-coating make it ideal for observers who value optical performance and comfort. Beginners will be satisfied as their first replacement eyepiece, while seasoned users can enjoy it as a versatile secondary lens. Its capabilities shine in observing lunar craters, planetary bands, double stars, and open clusters, making it a valuable addition to any astronomy enthusiast’s regular observing sessions.
