At a Glance
23mm
Focal Length
82°
Apparent FOV
18mm
Eye Relief
2"
Barrel Size
Score Breakdown
Overview
The Celestron Luminos 23mm is a low-power eyepiece designed to give you broad, sweeping views of the night sky without sacrificing optical quality. Its 82-degree apparent field of view puts it in the same category as premium wide-field designs, making it well suited for scanning star clusters, large nebulae, and the Milky Way. The fully multi-coated six or seven element optical system keeps contrast solid and minimizes light loss, which matters when you are chasing faint objects in a dark field.
At 23mm, this eyepiece works best as your go-to for low-power, wide-field work. Pair it with a fast refractor for generous exit pupils and a bright, expansive view, or use it on a longer focal length scope like a Celestron EdgeHD to frame larger targets comfortably. One practical advantage is that all six Luminos eyepieces are parfocal with each other, so swapping to a higher power eyepiece during a session requires minimal refocusing.
The rubber grip, retractable eyecup, and threaded barrel for filters are small details that add up to a more comfortable, practical observing experience. At $249.95, it sits in the mid-range price tier and carries a two-year warranty with US-based support.
Key Features
- 82-degree apparent field of view delivers genuinely immersive, wide-angle views comparable to premium eyepiece lines
- Fully multi-coated optics reduce glare and light loss, supporting better contrast on faint deep-sky objects
- Parfocal with other Luminos eyepieces, making mid-session magnification changes faster and less disruptive
- Retractable eyecup accommodates both eyeglass wearers and those observing without glasses
- Threaded barrel accepts standard 1.25-inch filters, adding flexibility for lunar, nebula, or light pollution work
- Rubber grip improves handling in cold conditions or when wearing gloves during winter sessions
- Two-year US warranty and direct support from Celestron back the purchase with practical reassurance
Specifications
| Focal Length | 23mm |
| Apparent FOV | 82° |
| Eye Relief | 18mm |
| Barrel Size | 2" |
| Design | Modified Nagler |
| Elements/Groups | 7/4 |
| Series | Luminos |
| Coating | Fully Multi-Coated |
| Waterproof | No |
Popular Telescopes for This Eyepiece
Sky-Watcher FlexTube 300 SynScan
65x / 4.7mm exit pupil / Dobsonian
Sky-Watcher FlexTube 300P
65x / 4.7mm exit pupil / Dobsonian
Celestron 114LCM
43x / 2.7mm exit pupil / Newtonian
Celestron EdgeHD 800 OTA
88x / 2.3mm exit pupil / Schmidt-Cassegrain
Amazon Reviews
What can you say about Luminos eyepieces? First impression, they are big and heavy. Lots of glass and metal that could put you over the limit on your mount if you are already close, but so worth the view! I now own the 31mm, 23mm, 19mm, and 15mm Luminos eyepieces. For the money they are a great valu...
Really a fantastic eyepiece. Going from the stock, 1.25" EPs to this was very cool. This thing is as big as -- and solid as -- a grenade! Make sure you balance your OTA with it on before you use it. Best with a quality diagonal, of course. (I use a Celestron, Dielectric Star 2" on a C9.25 SCT.) Very...
The build quality is excellent. It’s heavier than I expected, but that’s a testament to its sturdy anodized aluminum construction. The rubber grip is a nice touch, especially when observing in colder weather. I also appreciate the retractable eyecup, although I rarely use it fully extended.
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