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Black cylindrical eyepiece with dual 2" and 1.25" barrel, rubber grip and lens caps

Tele Vue

Tele Vue 10mm Ethos-SX 100° Eyepiece 2" / 1.25

SKU CH-0ARE-755CN

A 10 mm eyepiece with a 100° apparent field, 15 mm eye relief and dual 2"/1.25" barrel fits a wide range of telescopes

  • Immersive 100° apparent field reveals expansive night-sky views
  • 15mm eye relief allows comfortable observing with eyeglasses
  • Dual 2" and 1.25" barrel fits a wide range of focusers
  • 7mm field stop maximises visible area for wide-field images
  • 10mm focal length bridges 13mm and 8mm gaps for versatile magnification

10mm Ethos-SX 100° Eyepiece

The Tele Vue 10mm Ethos-SX provides a 100° apparent field for immersive astronomical viewing. It features 15mm eye relief suitable for spectacle wearers and accepts DIOPTRX astigmatism correctors. The 17.7mm field stop is engineered to maximise visible area with high contrast and sharpness.

Upgrade from 82° Nagler eyepieces

This eyepiece delivers a viewing area 50% larger than 82° Naglers, offering a significant jump in immersion. It fills the focal-length gap between 13mm and 8mm models, completing a 17mm/10mm/6mm Ethos set. The combination of wide field and shorter focal length yields higher magnification with a darker sky background.

Suited for deep-sky and planetary observers

Ideal for astronomers wanting a versatile "do-it-all" eyepiece compatible with 2" and 1.25" focusers. It excels at revealing faint stars and detail on deep-sky objects while maintaining crisp planetary images. Not suited for buyers needing focal lengths outside the 10mm specification or those requiring a different barrel format.

Highlights

  • Immersive 100° apparent field reveals expansive night-sky views
  • 15mm eye relief allows comfortable observing with eyeglasses
  • Dual 2" and 1.25" barrel fits a wide range of focusers
  • 7mm field stop maximises visible area for wide-field images
  • 10mm focal length bridges 13mm and 8mm gaps for versatile magnification

Specifications

No published specifications for this item yet.

Questions about this item

Will the 10mm Ethos-SX fit both 2" and 1.25" focusers on my telescope?

Yes, the barrel accepts both 2" and 1.25" focusers, so you can use it with a wide range of telescopes without an adapter.

What is the critical step when inserting the eyepiece to avoid damaging the barrel or focuser?

Align the safety groove on the barrel with the focuser's locking screw before tightening, otherwise the set screw can mar the barrel or slip under vibration.

How often should I clean the eye lens on the 10mm Ethos-SX, and what is the safe method?

Clean only when visible dust affects the view; use a bulb blower first, then a lens pen or microfibre cloth with a drop of optical fluid — never rub dry.

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