Tele Vue Ethos-SX 3,7 mm 110° oculair 2 inch / 1,25 inch

The Tele Vue Ethos-SX 3.7 mm eyepiece delivers an extraordinary 110° apparent field of view, offering immersive wide-field views even at high magnifications. Designed for serious astronomers, this eyepiece combines exceptional optical performance with a compact, lightweight build.

Advantages

With an 8-element optical design and fully multi-coated lenses, the Ethos-SX provides sharp, high-contrast images with minimal chromatic aberration. The 15 mm eye relief ensures comfortable viewing, while the fold-down rubber eyeguard accommodates eyeglass wearers. Dual 2" and 1.25" barrels offer versatility across different telescopes.

Suitable for

• Refractor telescopes
• Reflector telescopes
• Catadioptric telescopes

Key specifications

• Focal Length: 3.7 mm
• Apparent Field of View: 110°
• Eye Relief: 15 mm
• Barrel Size: 2" / 1.25"
• Optical Design: 8 elements
• Coatings: Fully Multi-Coated
• Field Stop Diameter: 7.1 mm
• Filter Threads: Yes (2" and 1.25")
• Parfocal: Yes
• Housing Material: Anodized Aluminum

Recommendations

For the ultimate wide-field experience at high power, pair this eyepiece with a quality telescope and a stable mount. Ideal for planetary, lunar, and deep-sky observations.