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The eyepiece that comes in the box with a Celestron telescope is usually a 25mm and a 10mm Kellner. They work, but they are the weakest part of the scope. Swapping them is the cheapest way to get sharper planets, wider star fields and more comfortable views.

I have owned a NexStar 6SE for years and spent many nights with a StarSense Explorer LT 114AZ and an AstroMaster 130EQ. Every eyepiece below has been in one of those focusers. This guide covers all four Celestron eyepiece lines sold today, which one fits each job and which focal lengths to buy for the most common Celestron telescopes.

Quick picks

Eyepiece Best for Field of view Link
X-Cel LX 7mm Best overall, planets 60° See on Amazon
Omni Plössl 32mm Budget, low power 52° See on Amazon
8-24mm Zoom One eyepiece for everything 40° to 60° See on Amazon
Luminos 15mm Wide views in a 1.25″ focuser 82° See on Amazon
Ultima Edge 18mm Eyeglass wearers 65° See on Amazon
Luminos 23mm 2″ Deep sky in a 2″ focuser 82° See on Amazon
Ultima Edge 30mm 2″ Low power, sharp to the edge 70° See on Amazon
Eyepiece and Filter Kit Complete starter set 52° See on Amazon
AstroMaster Accessory Kit Cheapest first upgrade Varies See on Amazon

Celestron eyepieces explained

Celestron sells four eyepiece lines. They differ in field of view, eye relief and how sharp the stars stay toward the edge.

  • Omni (Plössl): four lenses, a 52° field and the lowest prices in the range. Sharp in the center. Eye relief shrinks with focal length, so the 4mm and 6mm are tight.
  • X-Cel LX: six lenses, a 60° field and 16mm of eye relief in every focal length from 2.3mm to 25mm. Built for the Moon and planets.
  • Ultima Edge: flat-field designs with a 60° to 70° field and long eye relief. Stars stay pinpoint almost to the edge, even in fast reflectors.
  • Luminos: 82° ultra-wide fields. The most immersive view Celestron makes, in 1.25″ (7, 10 and 15mm) and 2″ (19, 23 and 31mm) barrels.

Celestron also sells an 8-24mm zoom and two accessory kits built around Plössl eyepieces. All of them are threaded for standard filters and fit any telescope with a 1.25″ or 2″ focuser, not only Celestron scopes.

The best Celestron eyepieces

Celestron X-Cel LX 7mm eyepiece

Best overall

1. Celestron X-Cel LX 7mm

The X-Cel LX is the line I recommend first to anyone with a Celestron telescope. The 7mm gives 143x in a StarSense LT 114AZ and 129x in an LT 80AZ, which is about the most power those scopes hold on an average night. On Jupiter it shows the two main belts, the Great Red Spot when it faces us and the shadows of the moons crossing the disk.

What sets the line apart is the 16mm of eye relief at every focal length. A Plössl at 7mm makes you press your eye against the glass. The X-Cel LX lets you sit back, and the twist-up eyeguard blocks stray light from neighbors’ porch lights.

  • Focal lengths: 2.3, 5, 7, 9, 12, 18 and 25mm
  • Field of view: 60°
  • Eye relief: 16mm
  • Barrel: 1.25″
  • Best match: every Celestron scope; the 7mm for refractors and reflectors, the 9mm for the NexStar SE line
  • What I liked: sharp, high-contrast planets, comfortable eye relief, a grip that works with gloves
  • Drawbacks: the 60° field is narrower than the Luminos; the 2.3mm is more power than most scopes can use

Other useful sizes: 5mm for short focal length reflectors, 12mm and 18mm for medium power, 25mm to replace the stock eyepiece.

Check the X-Cel LX 7mm on Amazon

Celestron Omni 32mm Plössl eyepiece

Best budget

2. Celestron Omni Plössl 32mm

The Omni 32mm is the first eyepiece I would add to any Celestron telescope. It gives close to the widest true field a 1.25″ eyepiece can show. In an AstroMaster 130EQ the whole Pleiades cluster fits in the view, and finding objects in any scope gets easier. In my 6SE it gives 47x and frames the Andromeda Galaxy core with room to spare.

Plössls are simple four-lens designs. They are sharp in the center and cost the least of any Celestron eyepiece. The 32mm has long eye relief, so it works with glasses. The short focal lengths are a different story: the 6mm and 4mm put your eye almost on the lens.

  • Focal lengths: 4, 6, 9, 12, 15, 32 and 40mm
  • Field of view: 52° (43° on the 40mm)
  • Eye relief: long at 32mm, short at 9mm and below
  • Barrel: 1.25″
  • Best match: any Celestron scope as the low-power eyepiece; the 40mm on the NexStar 8SE
  • What I liked: the most affordable way to get a wide field, sharp center, threaded for filters
  • Drawbacks: edges soften in fast reflectors like the AstroMaster 130; tight eye relief at short focal lengths

The 40mm shows the same amount of sky as the 32mm in a 1.25″ barrel, just at lower power with a narrower apparent field. Buy the 40mm only for the 8SE, where the extra step down in power helps.

Check the Omni 32mm on Amazon

Celestron 8-24mm zoom eyepiece

Best zoom

3. Celestron 8-24mm Zoom

One eyepiece that covers 8 to 24mm. In an LT 80AZ that is 37x to 112x; in a 6SE it is 63x to 188x. I keep it in the bag for public outreach nights, where I can find an object at 24mm and twist to 8mm without swapping glass in the dark.

The trade-off is field of view. At 24mm the field is a narrow 40°, which feels like looking down a tube. At 8mm it widens to 60°. For planets and the Moon that matters little. For star clusters, the Omni 32mm shows far more sky.

  • Focal lengths: 8 to 24mm, continuous
  • Field of view: 40° at 24mm to 60° at 8mm
  • Eye relief: 15 to 18mm
  • Barrel: 1.25″
  • Best match: StarSense Explorer and AstroMaster owners who want one upgrade
  • What I liked: fast framing of the Moon and planets, decent eye relief across the range
  • Drawbacks: narrow field at the low-power end; needs a small focus touch-up when zooming

I compare it with the Baader and Svbony zooms in the zoom eyepiece guide.

Check the 8-24mm Zoom on Amazon

Celestron Luminos 15mm eyepiece

Best wide field (1.25″)

4. Celestron Luminos 15mm

The Luminos 15mm puts an 82° field in a 1.25″ barrel, so it works in scopes that can’t take 2″ eyepieces, like the NexStar 4SE and the StarSense Explorers. In my 6SE it gives 100x, and the Orion Nebula fills the view with the Trapezium stars sharp in the middle. Open clusters like M35 look like they float in space.

  • Focal lengths: 7, 10 and 15mm (1.25″); 19, 23 and 31mm (2″)
  • Field of view: 82°
  • Eye relief: comfortable without glasses; tight with them
  • Barrel: 1.25″
  • Best match: NexStar 4SE, 5SE and 6SE, the StarSense LT 114AZ
  • What I liked: the widest view Celestron makes in a 1.25″ eyepiece, solid aluminum build
  • Drawbacks: stars stretch near the edge in f/5 reflectors; larger and heavier than other 1.25″ eyepieces

The 10mm and 7mm Luminos work for planets in a slow scope like an SCT, where the edge distortion is mild.

Check the Luminos 15mm on Amazon

Celestron Ultima Edge 18mm eyepiece

Best for eyeglass wearers

5. Celestron Ultima Edge 18mm

The Ultima Edge line is Celestron’s flat-field series. Stars stay points almost to the edge of the view, which matters most in fast reflectors where Plössls and wide-field eyepieces blur at the edges. The 18mm has 20mm of eye relief, enough to see the whole field with glasses on.

In the AstroMaster 130EQ it gives 36x, and the Double Cluster in Perseus stays sharp from one side of the view to the other. In the 6SE it gives 83x, my go-to power for globular clusters like M13.

  • Focal lengths I recommend: 10mm, 18mm and 24mm (1.25″), 30mm (2″)
  • Field of view: 65° (60° on the 10mm)
  • Eye relief: 20mm (16mm on the 10mm, 29mm on the 24mm)
  • Barrel: 1.25″
  • Best match: AstroMaster 130EQ and other fast reflectors; any scope if you wear glasses
  • What I liked: sharp edges, long eye relief, parfocal so the focus barely changes between eyepieces
  • Drawbacks: costs more than the X-Cel LX; fewer focal lengths to choose from

Check the Ultima Edge 18mm on Amazon

Celestron Luminos 23mm 2-inch eyepiece

Best 2″ for deep sky

6. Celestron Luminos 23mm 2″

If your scope takes 2″ eyepieces, the Luminos 23mm is the most impressive view Celestron sells. I use it in my 6SE with a 2″ SCT diagonal: 65x with an 82° field, wide enough to fit the Veil Nebula’s eastern arc with an OIII filter. In an 8SE it shows all of M13 with its outer stars resolved and dark sky around the cluster.

  • Focal lengths: 19mm, 23mm and 31mm (2″)
  • Field of view: 82°
  • Eye relief: comfortable without glasses
  • Barrel: 2″
  • Best match: NexStar 6SE and 8SE with a 2″ diagonal, Dobsonians with 2″ focusers
  • What I liked: a wide, immersive field on nebulae and star clouds
  • Drawbacks: heavy enough to upset the balance on a small mount; needs a 2″ focuser or diagonal

The NexStar SE scopes ship with a 1.25″ visual back. You need a 2″ SCT-threaded diagonal to use any 2″ eyepiece; my star diagonal guide covers the options. The 4SE can’t take 2″ eyepieces at all.

Check the Luminos 23mm on Amazon

Celestron Ultima Edge 30mm 2-inch eyepiece

Best 2″ low power

7. Celestron Ultima Edge 30mm 2″

The Ultima Edge 30mm is the low-power eyepiece I keep in my 2″ diagonal. It gives 50x in the 6SE with a 70° field and 22mm of eye relief, and the stars stay sharp across the view. Sweeping the Milky Way through Cygnus with it is the best part of any summer night.

  • Focal length: 30mm
  • Field of view: 70°
  • Eye relief: 22mm
  • Barrel: 2″
  • Best match: NexStar 6SE and 8SE with a 2″ diagonal, 2″ Dobsonians
  • What I liked: sharp edges, comfortable with glasses, lighter than the Luminos 31mm
  • Drawbacks: only useful in a 2″ focuser; a big step up in cost from a Plössl

Check the Ultima Edge 30mm on Amazon

Celestron Eyepiece, Barlow and Filter Accessory Kit in its aluminum case

Best kit

8. Celestron Eyepiece, Barlow and Filter Kit (1.25″)

This was the first accessory I bought for my 6SE and it is still in my car. You get five Plössl eyepieces (32, 17, 13, 8 and 6mm), a 2x Barlow, a Moon filter and a set of color filters in a foam-lined aluminum case. With the Barlow that is ten magnifications.

The eyepieces are a step above the stock Kellners and on par with the Omni line. The filters are the weak point; the Moon filter gets used and the color filters mostly stay in the case.

  • Focal lengths: 32, 17, 13, 8 and 6mm plus a 2x Barlow
  • Field of view: 52°
  • Barrel: 1.25″
  • Best match: new owners of any Celestron scope who want a full set at once
  • What I liked: covers every power you need, good case, costs less than buying the pieces one by one
  • Drawbacks: tight eye relief on the 8mm and 6mm; the color filters add little

A 2″ version exists for 2″ focusers. Other brands’ kits are in my eyepiece set guide.

Check the 1.25″ kit on Amazon

Celestron AstroMaster Accessory Kit with eyepieces, Barlow and filters

Cheapest first upgrade

9. Celestron AstroMaster Accessory Kit

A small kit made for the AstroMaster and PowerSeeker lines. It has a 15mm Kellner, a 6mm Plössl, a 2x Barlow with T-threads for a camera, a Moon filter and red and blue filters. In an AstroMaster 130EQ the 6mm gives 108x, a real step up from the stock 10mm for Saturn’s rings.

  • Focal lengths: 15mm Kellner, 6mm Plössl plus a 2x Barlow
  • Barrel: 1.25″
  • Best match: AstroMaster and PowerSeeker owners on a tight budget
  • What I liked: the cheapest way to add high power, Barlow doubles as a camera adapter
  • Drawbacks: no low-power eyepiece; the 15mm Kellner is only a small upgrade

Check the AstroMaster kit on Amazon

Which focal length for your Celestron telescope

Magnification is the telescope’s focal length divided by the eyepiece’s focal length:

Magnification = telescope focal length ÷ eyepiece focal length

A NexStar 6SE has a 1500mm focal length, so a 25mm eyepiece gives 60x and a 9mm gives 167x. The practical limit is about 50x per inch of aperture, and the air above you caps most nights at 200x to 300x no matter the scope.

A good set has three eyepieces: a low-power one for finding objects and big clusters, a medium one for galaxies and globulars and a high-power one for the Moon, planets and double stars. Here is what I would buy for the most popular Celestron telescopes.

Telescope Focal length Low power Medium High power
StarSense Explorer LT 80AZ 900mm Omni 32mm (28x) X-Cel LX 12mm (75x) X-Cel LX 7mm (129x)
StarSense Explorer LT 114AZ 1000mm Omni 32mm (31x) X-Cel LX 12mm (83x) X-Cel LX 7mm (143x)
AstroMaster 130EQ 650mm Omni 32mm (20x) Ultima Edge 10mm (65x) X-Cel LX 5mm (130x)
NexStar 4SE 1325mm Omni 32mm (41x) X-Cel LX 18mm (74x) X-Cel LX 9mm (147x)
NexStar 5SE 1250mm Omni 32mm (39x) Luminos 15mm (83x) X-Cel LX 7mm (179x)
NexStar 6SE 1500mm Omni 32mm (47x) Ultima Edge 18mm (83x) X-Cel LX 9mm (167x)
NexStar 8SE 2032mm Omni 40mm (51x) Ultima Edge 18mm (113x) X-Cel LX 9mm (226x)

A Barlow lens doubles every eyepiece you own, so a 2x Barlow plus two eyepieces covers four powers. The X-Cel LX 2x Barlow is the one I use; the Omni 2x Barlow costs less. Pick focal lengths that don’t overlap once doubled: a 32mm and a 12mm with a Barlow give 32, 16, 12 and 6mm. My Barlow lens guide covers the rest.

For planet-specific picks, including non-Celestron eyepieces, see the best eyepieces for planets. If you are still choosing a telescope, the telescope finder matches one to your sky and budget.

FAQ

Are Celestron eyepieces good?

Yes. The Omni Plössls are among the best value eyepieces sold, and the X-Cel LX, Ultima Edge and Luminos lines compete with eyepieces from Explore Scientific and Svbony at similar cost. They are a clear upgrade over the Kellner eyepieces that come with most beginner telescopes.

Do Celestron eyepieces fit other telescopes?

Yes. Celestron eyepieces use the standard 1.25″ and 2″ barrel sizes, so they fit any telescope with a matching focuser or diagonal, including Sky-Watcher, Orion, Meade and Zhumell scopes.

Which Celestron eyepiece is best for planets?

The X-Cel LX line. Pick the focal length that gives 120x to 180x in your telescope: the 7mm for 900mm to 1250mm scopes, the 9mm for the NexStar 6SE and 8SE and the 5mm for short reflectors like the AstroMaster 130EQ.

What eyepieces come with Celestron telescopes?

Most Celestron refractors and reflectors ship with a 25mm and a 10mm eyepiece, often Kellners. The AstroMaster 130EQ includes a 20mm erect-image and a 10mm eyepiece. The NexStar SE telescopes ship with a single 25mm eyepiece.

Can I use 2-inch eyepieces on a NexStar SE?

On the 5SE, 6SE and 8SE, yes, with a 2″ SCT-threaded diagonal that replaces the stock 1.25″ visual back and diagonal. The 4SE is a Maksutov with a 1.25″ rear port and can’t use 2″ eyepieces.

Is the Celestron 8-24mm zoom worth it?

For a beginner who wants one upgrade, yes. It replaces three or four fixed eyepieces and makes framing planets easy. Its narrow field at 24mm means you still want a 32mm Plössl for finding objects and viewing large clusters.

What does the mm number on an eyepiece mean?

It is the eyepiece’s focal length. A smaller number gives more magnification. Divide your telescope’s focal length by the eyepiece’s focal length to get the magnification.

What is the highest magnification I can use?

About 50x per inch of aperture, or 2x the aperture in millimeters. That is 160x for an 80mm refractor and about 400x for an 8SE, but steady air rarely allows more than 250x to 300x in practice.