Celestron Omni 4 mm: high magnification for the Moon and planets in calm air
The Celestron Omni 4 mm is a classic Plossl eyepiece with four fully multi-coated lens elements. The lens edges are black to reduce internal reflections, resulting in a contrast-rich image with natural colors.
With a focal length of 4 mm, you get the highest magnification from the Omni series. Use this eyepiece on clear nights with stable air for lunar craters, Saturn's rings, and Jupiter's cloud bands.

Features
- Forty-degree Plössl design with fully multi-coated optics
- Blackened lens edges for maximum contrast
- Aluminum housing with matte anodized finish to prevent stray light
- Foldable rubber eyecup, also usable with glasses
- Threads for 1.25-inch (31.75 mm) filters
Compatibility
Fits any 1.25 inch (31.75 mm) focal length or zenith mirror and works with any telescope type: refractor, reflector and catadioptric. The magnification you achieve is the focal length of your telescope divided by 4 mm.
Specifications
| Focal length | 4 mm |
| Optical design | Plössl, 4 elements |
| Connection size | 1.25 inches (31.75 mm) |
| Coating | Fully multi-coated |
| Filter thread | Yes, 1.25 inch |
| Eyecup | Rubber, foldable |
You can find more accessories for this brand at the Celestron brand page.





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