Celestron Omni 6 mm eyepiece Telescope 5 mm Black Silver

The Celestron Omni 6 mm eyepiece provides a 5 mm focal length in a compact form factor (77 mm × 42 mm × 42 mm) designed for detailed astronomical observations. Part of the Omni series, this eyepiece offers a 50° apparent field of view and a premium four-element optical design with multi-layer high-transmission coatings. Optical edges are blackened to improve contrast, and the aluminum body features a two-step anodized matte finish that reduces reflections. The eyecup is made of black rubber and can be used folded or unfolded to accommodate eyeglass wearers; the barrel is threaded to accept standard 1.25" filters.

Advantages

The combination of a short 5 mm focal length and a 50° apparent field of view delivers higher magnification suitable for lunar and planetary detail while preserving a comfortable viewing field. Multi-layer coatings and blackened lens edges increase light transmission and contrast for sharper, clearer images. The anodized aluminum housing is lightweight, durable, and minimizes stray reflections during observations. A foldable rubber eyecup enhances eye relief options and comfort for users with and without glasses, and the threaded barrel offers compatibility with 1.25" filters for extended versatility.

Suitable for

• Detailed lunar observations and high-contrast views of the Moon
• Planetary viewing where high magnification is required
• Bright deep-sky targets where higher power is useful for resolving structure
• Use with telescopes that accept 1.25" eyepieces for visual astronomy

Key specifications

• Focal length: 5 mm
• Apparent field of view: 50°
• Optical design: four-element, multi-coated lenses
• Lens edge treatment: blackened edges for increased contrast
• Body material: anodized aluminum with matte finish
• Dimensions: 77 mm (width) × 42 mm (depth) × 42 mm (height)
• Eyecup: black rubber, foldable for eyeglass use
• Barrel: 1.25" insert, threaded for filters

How to use

Insert the Celestron Omni 6 mm eyepiece into a compatible 1.25" focuser or diagonal and secure it with the focuser thumbscrew. For higher magnification views of the Moon and planets, use this 5 mm eyepiece after achieving coarse focus with a low-power eyepiece. Fold the rubber eyecup down if you wear glasses, or leave it up to position your eye closer to the lens for maximum eye relief. If needed, thread a 1.25" filter onto the barrel before insertion or attach it while the eyepiece is mounted, taking care to re-focus after adding a filter.

Usage recommendations

Use the Omni 6 mm eyepiece on nights of steady atmospheric seeing for best results; high magnification is sensitive to turbulence. Begin observing with a low-power eyepiece to locate and center the target, then switch to the 6 mm for detail work. Clean optical surfaces sparingly with appropriate lens-cleaning tools and store the eyepiece in a protective case when not in use to preserve coatings and the anodized finish.