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Black cylindrical 2-inch telescope eyepiece with rubber grip

Tele Vue

Tele Vue 17mm Ethos 2" Eyepiece 100° 15mm eye relief

SKU CH-EZP3-782WA

Wide 100° apparent field, 17mm focal length and 15mm eye relief for immersive deep-sky viewing

  • 100° apparent field reveals sweeping celestial vistas
  • 15 mm eye relief enables comfortable extended viewing sessions
  • 17 mm focal length balances magnification with wide-field performance
  • 6 mm field stop maximises true field in 2" focusers
  • 55 lb weight keeps telescope balance manageable

17 mm 100° Ethos eyepiece

The Tele Vue 17 mm Ethos eyepiece delivers a 100° apparent field through a 2‑inch barrel. Its 17 mm focal length and 15 mm eye relief suit visual astronomers who want immersive, wide‑angle views of deep‑sky objects without vignetting.

Edge sharpness across the full field

A 29.6 mm field stop and multi‑element optical design maintain contrast and pinpoint stars to the field edge during long observing sessions. The 1.55 lb (24.8 oz) weight stays balanced on most 2‑inch focusers, reducing creep during extended use.

Check focuser barrel size and back focus

Verify your telescope accepts a 2‑inch barrel or has a compatible 1.25″ adapter with sufficient back focus. Ensure the focuser can support the eyepiece mass without slip, and confirm eye relief works with your eyeglasses if worn.

Highlights

  • 100° apparent field reveals sweeping celestial vistas
  • 15 mm eye relief enables comfortable extended viewing sessions
  • 17 mm focal length balances magnification with wide-field performance
  • 6 mm field stop maximises true field in 2" focusers
  • 55 lb weight keeps telescope balance manageable

Specifications

No published specifications for this item yet.

Questions about this item

How much eye relief does the 17mm Ethos provide for comfortable all-night viewing?

The eyepiece delivers 15mm of eye relief, giving ample space for glasses wearers and reducing eye strain during extended observing sessions.

Which focuser size must my telescope already have to accept this 2-inch eyepiece?

Your telescope needs a 2-inch focuser; the barrel is sized for 2-inch focusers and will not fit a 1.25-inch drawtube without an adapter.

Will the 29.6mm field stop of this 17mm Ethos match the true field of my existing 13mm Ethos?

The 17mm model has a larger 29.6mm field stop, so it yields a wider true field than the 13mm Ethos when used in the same telescope.

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