TeleVue Eyepiece Ethos 4.7mm 1.25"/2" (23253)

TeleVue Ethos 4.7 mm Eyepiece 1.25"/2" (Model 23253)

The TeleVue Ethos 4.7 mm eyepiece delivers an extraordinarily wide and immersive observing experience, designed for astronomers who want to feel as though they are floating through space. With its massive apparent field of view and outstanding optical performance, it sets a benchmark in premium eyepiece design. The Ethos series represents one of TeleVue’s most advanced developments in high-end optics. Once experienced, its expansive and sharp presentation fundamentally transforms visual observation.

An Expansive Window to the Universe

Traditional eyepieces typically offered a 50° to 60° field of view, and even 82° designs once felt impressive. The Ethos 4.7 mm goes far beyond that, providing an extraordinary 110° apparent field of view. Compared to an 82° eyepiece, this represents roughly a 50% increase in visible sky. The result is an almost boundless visual field, eliminating the “tunnel effect” and creating a panoramic, spacewalk-like sensation.

Exceptional Sharpness and Optical Quality

The Ethos eyepieces are engineered to maintain remarkable sharpness across the entire field, including the edges. They perform exceptionally well even with fast telescopes, such as those with focal ratios around f/4. Advanced optical design combined with high-quality multi-coatings ensures excellent light transmission, contrast, and color fidelity. Fine planetary details and subtle deep-sky structures become easier to observe thanks to the high contrast and brilliant image quality.

Versatility and Comfort

The Ethos series is available in multiple focal lengths to suit a wide variety of telescopes and observing styles. Depending on the focal length, models are compatible with 1.25" and/or 2" focusers. A soft rubber eyecup enhances viewing comfort, while the robust mechanical construction ensures durability for long-term use.

The Ethos line has received widespread recognition and multiple awards from respected astronomy publications, reflecting its reputation among experienced observers.

Key Advantages
110° apparent field of view (for 3.7 mm and 4.7 mm models)
Very high sharpness across the entire field
Excellent performance with fast telescopes
High-contrast, premium optical quality
Comfortable viewing design
1.25" and 2" compatibility

Optical Specifications
Focal length: 4.7 mm
Apparent field of view: 110°
Eye relief: 15 mm
Optical coating: Multi-coated
Telescope connection: 1.25"

Special Features
Foldable eyecup
Homofocal within the series: Yes
Filter thread: Yes
Inert gas purging: No

General Information
Series: Ethos
Type: Eyepiece
Design: Extra Wide Angle (XWA)
Weight: 590 g