STARBASE ORTHOSCOPIC EYEPIECE

$32.83 ~~$49~~ In stock

Category: Eyepieces

Description

This orthoscopic eyepiece has 4 elements in 2 groups low distortion, particularly in the center of the field.

Specifications

Apparent Field of View: 45 degrees

focal length: 20 mm

eye relief: 14 mm

focal length: 18 mm

eye relief: 13 mm

focal length: 14 mm

eye relief: 12 mm

focal length: 9 mm

eye relief: 7 mm

focal length: 6 mm

eye relief: 4 mm

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Eva ★★★★★ Oct 21, 2026

I was really impressed by how sharp the view stays across the whole field — the low distortion claim is no joke. The 45-degree apparent field is plenty wide for my lunar observing sessions, and it's comfortable to look through for long periods.

Elizabeth B. ★★★★★ Oct 20, 2026

The eye relief on this 20mm ortho is spot-on for my comfort, even with glasses on. Stars are pin-sharp right across the field, with no noticeable distortion in the center.

Sophia A. ★★★★★ Oct 19, 2026

The 20mm focal length gives me crisp, steady views of Jupiter’s bands without any color fringing. Eye relief is tight but manageable with my glasses, and the 45-degree field feels perfectly wide for lunar observing.