Celestron X-Cel LX 18 mm 1.25ft Eyepiece - Optimized Planetary Views

In this review the Celestron X-Cel LX 18 mm 1.25' eyepiece is assessed as a mid-range optical accessory aimed at amateur astronomers who want a comfortable, high-contrast view of the Moon and planets. The single biggest reason to consider this eyepiece is its well-executed optical design: a six-element, fully multi-coated lens set that delivers a clear image with increased contrast and a roomy 60 apparent field of view, making planetary details easier to pick out without resorting to very short focal lengths.

Key Features

• 60 apparent field of view: Provides a wide, immersive view that helps keep planetary disks and lunar terrain fully visible without constant re-centering.
• Six-element fully multi-coated optics: High-transmission coatings and blackened lens edges reduce stray light and boost contrast for sharper detail on bright targets.
• 16 mm eye relief: Comfortable positioning for most observers, including those who wear glasses, so extended viewing sessions stay strain-free.
• Pop-up rubber eyeguards: Adjustable eyecups twist up or down to suit eye position and increase perceived contrast by blocking peripheral light.
• Treaded rubber grip: A positive, no-slip grip makes swapping eyepieces easier even when wearing gloves outdoors.
• 1.25' threaded barrel: Accepts filters directly, allowing quick use of color or lunar filters without extra adapters.

Who It's For

The Celestron X-Cel LX 18 mm is best for hobbyists and binocular-to-small-telescope owners seeking a reliable ocular for planetary and Moon observing that balances field of view with comfortable eye relief. It suits observers who value solid build quality and want parfocal performance across a matched eyepiece set.

It is less appropriate for someone whose primary interest is wide-field deep-sky imaging at very low magnification or for observers seeking ultra-wide 80+ apparent field eyepieces. Users on an extreme budget may prefer simpler eyepieces, though they will likely trade away the contrast and coatings this model provides.

Pros & Cons

Pros

• Excellent optical clarity and contrast from the six-element fully multi-coated design.
• Comfortable 16 mm eye relief and pop-up eyecups make long viewing sessions easier.
• Solid metal body with a treaded rubber grip gives a durable, positive feel during use.

Cons

• Field of view, while roomy at 60, is narrower than ultra-wide 70-80 FOV eyepieces favored for deep-sky sweeping.

Specifications

Brand	Celestron
Series	X-Cel LX
Focal length	18 mm
Barrel size	1.25'
Apparent field of view	60 degrees
Eye relief	16 mm
Construction	Six-element fully multi-coated optics; black-anodized aluminum body

Our Verdict

The X-Cel LX 18 mm 1.25' eyepiece is a well-rounded choice for planetary and lunar observers who want comfortable eye relief, solid build quality, and improved contrast from fully multi-coated optics. It offers good value for those upgrading from basic eyepieces and fits well into a parfocal set for quick swapping during observing sessions.

Frequently Asked Questions

Is this eyepiece parfocal with others in the series?
Yes. The X-Cel LX family is parfocal, so swapping between eyepieces in the set requires little or no refocusing.

Can I use filters with this eyepiece?
Yes. The 1.25' barrel is threaded to accept standard 1.25' filters for lunar and planetary work.

Will it be comfortable for eyeglass wearers?
Yes. The eyepiece provides about 16 mm of eye relief and has adjustable pop-up eyecups to help position the eye correctly.