Brightwell Brook 14 mm wide-field eyepiece, with hard case

Specifications

Description

The Brook 14 mm is a five-element wide-field eyepiece with a 60-degree apparent field and a 1.25 in barrel. It sits between low-power and medium-power eyepieces in a typical kit. It suits the observing most telescope owners do often, such as framing star clusters, sweeping across larger nebulae, and viewing the Moon in sections.

A 14 mm eyepiece gives different magnification depending on the telescope. You will see 50x in a 700 mm refractor, 86x in a 1,200 mm Dobsonian, and 145x in a 2,032 mm Schmidt-Cassegrain. In the 1,200 mm telescope, the true field is about 0.7 degrees, which is wide enough to fit the Double Cluster in one view and narrow enough to show the structure of many open clusters clearly.

The five-element design uses a field lens and an eye lens group to keep the image flat across the 60-degree field. Stars stay point-like out to the edge in telescopes slower than about f/6, with some softening at the edge in faster Newtonians. The lenses are fully multi-coated, and the barrel interior is blackened to reduce stray light. With 15 mm of eye relief, you can view the full field while wearing glasses, and the eyecup folds down to help.

The 14.0 mm field stop sets the true field in every telescope. The eyepiece threads for standard 1.25 in filters, so you can add a filter without changing the focuser setup. At 120 g, it is light enough for a binocular viewer or a small finder, and it pairs with a 25 mm eyepiece to cover low through medium magnifications.

About this configuration

The Brightwell Brook 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. The fold-down rubber eyecup blocks stray light, and you can fold it back if you observe with glasses.

Black anodizing is the standard finish of the Brook line and matches most focusers. The optics in the 2024 edition match the other years; the changes concern the housing only. To find the magnification, divide the focal length of your telescope by the eyepiece focal length in the specifications.

What's in the box

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

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 across most of the field at f/6 and slower; softer at the edge in faster Newtonians.