At a Glance
7mm
Focal Length
82°
Apparent FOV
18mm
Eye Relief
1.25"
Barrel Size
Score Breakdown
Overview
The Celestron Luminos 7mm is a short focal length eyepiece designed for high-magnification observing with a genuinely wide field of view. That 82-degree apparent field is the real selling point here. At 7mm, you are pushing magnification up, which means planetary detail, double stars, and tight globular clusters become the natural targets.
The wide field helps offset the narrowing true field that comes with high power, giving you more sky to work with than a standard Plossl or ortho would at the same focal length. The optical design uses six or seven elements with full multi-coating, which helps control glare and maintain contrast. It is worth noting that more elements can introduce slight light transmission losses compared to simpler designs, so this eyepiece is optimized for wide-angle views rather than pure contrast on very bright objects.
The rubber grip and retractable eyecup are practical touches, particularly for observers who wear glasses. All Luminos eyepieces are parfocal with each other, so if you own others in the series, switching powers mid-session becomes much less disruptive. At $139.95, this sits at a mid-range price point and carries a two-year warranty with US-based support.
Key Features
- 82-degree apparent field of view gives noticeably wider views than standard eyepieces at this focal length
- Fully multi-coated optics across all air-to-glass surfaces help maintain contrast and reduce internal reflections
- Parfocal with other Luminos eyepieces, reducing refocusing time when switching magnifications during a session
- Retractable eyecup accommodates both eyeglass wearers and those observing without glasses
- Rubber grip improves handling in cold conditions or when wearing gloves
- Threaded barrel accepts standard 1.25-inch filters, useful for planetary or light pollution work
- Two-year US warranty and access to Celestron's support team add some confidence for a mid-range purchase
Specifications
| Focal Length | 7mm |
| Apparent FOV | 82° |
| Eye Relief | 18mm |
| Barrel Size | 1.25" |
| Design | Modified Nagler |
| Elements/Groups | 7/4 |
| Series | Luminos |
| Coating | Fully Multi-Coated |
| Waterproof | No |
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Amazon Reviews
I PURCHASED THE 7mm, 10mm, 15mm And i use them with 2 different Newtonian Telescopes: I was Gifted a Celestron 76mm Newtonian Telescope by my Wife, and it came with 2 Celestron Plossl EyePieces 10 & 20mm... Passion took over and shortly after i got my hands on another Newtonian Telescope, 150mm that...
This eyepiece is incredible! Its views are definitely on par if not better than my tele view ep that costs twice as much. I wish they made this in a 4-5 matthaglund but I combine it with a Celestron 2x Barlow and the images are still very bright and clear. Definitely an excellent ep for the money
Great upgrade from what I had before which were eyepieces that were included with my telescope. Images through this eyepiece are really clear and the wider field of view is amazing! It is a great purchase for the price. I highly recommend this eyepiece as an upgrade.
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