Quillon Corbel 14 mm wide-field eyepiece, with hard case

Specifications

Description

The Corbel 14 mm is a seven-element wide-field eyepiece with an 82-degree apparent field and a 1.25 in barrel. Its 21.0 mm field stop sets a true field of about 0.95 degrees in a 1,200 mm telescope, where the eyepiece gives 86x. That field is enough to frame the pair M81 and M82 together with room to spare, and the wide apparent field keeps the edges of the view comfortable. It suits observers who want moderate power with a wider view than a standard Plössl offers.

A 14 mm eyepiece gives medium power in most telescopes: 50x in a 700 mm refractor, 86x in a 1,200 mm Dobsonian, and 145x in a 2,032 mm Schmidt-Cassegrain. At these powers the wide apparent field keeps star fields open, so you can sweep the Milky Way without the view feeling cramped. The same magnification works well for splitting close double stars and for resolving the brighter open clusters, such as the two clusters in Perseus.

The design uses multi-coated lens surfaces and blackened edges to limit internal reflections and keep image contrast high. In telescopes slower than about f/6, the stars remain sharp to the edge of the field. In faster Newtonians, some edge softness may appear, and the field is most even with the target near the center.

With 15 mm of eye relief, the eyepiece suits most observers, including many who wear glasses, although observers with deep-set eyes may need to press closer to the eyepiece. The fold-down rubber eyecup blocks stray light when folded up and gives room for glasses when folded down. The 1.25 in barrel accepts standard filters and fits any 1.25 in focuser, diagonal, or Barlow lens.

About this configuration

The Quillon Corbel 14 mm wide-field eyepiece is offered in several configurations, and the notes below describe what this particular one adds. The hard foam-lined case protects the eyepiece from knocks during travel and stacks neatly with other cases. A hard case keeps the eyepiece safe in a busy accessory box at a star party or an outreach event. A winged eyeguard helps you hold your eye at the right position, which makes the edge of the field easier to see.

The black anodized barrel and body resist scratches and do not reflect light into the eyepiece. The 2023 edition uses the same lens design as later years, with small differences in the grip pattern. Check the barrel size in the specifications against your focuser or star diagonal before you choose a configuration.

What's in the box

• Eyepiece with fold-down rubber eyecup
• Top and bottom dust caps
• Plastic storage case
• Hard foam-lined case
• Winged rubber eyeguard

Compatibility notes

• Fits any 1.25 in focuser, diagonal, or Barlow lens.
• The barrel accepts standard 1.25 in filters (M28.5 x 0.6 thread).
• Sharp to the edge of the field at f/6 and slower; softer at the edge in faster Newtonians.