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Tele Vue 13mm Ethos-SX eyepiece, black barrel with dual 2 inch and 1.25 inch fit

Tele Vue

Tele Vue 13mm Ethos-SX Eyepiece 100° 15mm relief 2" 1.25

SKU CH-X0Z3-Z6A1X

A 13 mm eyepiece with a 100° apparent field, 15 mm eye relief and dual 2" / 1.25" barrels for immersive, comfortable astronomy viewing

  • Immersive 100° apparent field for edge-to-edge sharpness
  • Comfortable 15 mm eye relief reduces strain for eyeglass wearers
  • Dual 2" / 1.25" barrel fits a wide range of telescopes
  • High-quality coatings maximise light throughput for brighter images
  • 13 mm focal length delivers versatile magnification for deep-sky viewing

13mm Ethos-SX for immersive astronomy

The Tele Vue 13mm Ethos-SX eyepiece delivers a 100° apparent field for expansive, edge-to-edge views of celestial objects. Its 15mm eye relief supports comfortable, extended sessions and accommodates eyeglass wearers without vignetting. The dual 2" and 1.25" barrel fits a wide range of focusers and diagonals, making it a versatile choice for serious visual observers.

Upgrade from narrower or shorter-relief eyepieces

Moving to this model replaces eyepieces with smaller apparent fields or tighter eye relief that limit immersion and comfort. The jump is worth it when you want a single high-power eyepiece that combines ultra-wide perspective with generous 15mm relief for relaxed, glasses-friendly viewing across long nights.

Dual-barrel design fits most focusers and diagonals

The 2" and 1.25" barrel slips into standard focusers, diagonals and Barlow lenses without adapters, freeing you from hunting for specific barrel reducers. High-transmission coatings preserve contrast and brightness, so the eyepiece performs cleanly in fast and slow telescopes alike.

Highlights

  • Immersive 100° apparent field for edge-to-edge sharpness
  • Comfortable 15 mm eye relief reduces strain for eyeglass wearers
  • Dual 2" / 1.25" barrel fits a wide range of telescopes
  • High-quality coatings maximise light throughput for brighter images
  • 13 mm focal length delivers versatile magnification for deep-sky viewing

Specifications

No published specifications for this item yet.

Questions about this item

Will the dual 2" and 1.25" barrel fit my telescope's focuser?

The eyepiece accepts both 2" and 1.25" focusers, so it fits either barrel size without an additional adapter.

How do I secure the eyepiece in the focuser, and what step is often missed?

Insert the barrel fully, then tighten the focuser's locking screw or compression ring until the eyepiece cannot rotate; skipping the final snug turn lets the heavy optic shift during slewing.

When and how should I clean the eye lens?

Clean only when visible dust affects the view; use a bulb blower first, then a lens pen or optical tissue with isopropyl alcohol, wiping gently in a circular motion from the centre outward.

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