32mm Eyepiece (20x on 130mm f/5)
Best for: Wide-field views — finding targets, open clusters, the Pleiades, full Moon overview.
Quality: Good — wide field, comfortable eye placement.
Verdict: ✅ Use this first for every observing session.
UK telescope accessory review
Celestron Eyepiece and Filter Kit Review 2026: The Best Telescope Upgrade for UK Buyers?
What's in the Box?
| Item | Focal Length | Magnification (130mm f/5) |
|---|---|---|
| Eyepiece 1 | 4mm | 162x |
| Eyepiece 2 | 6mm | 108x |
| Eyepiece 3 | 9mm | 72x |
| Eyepiece 4 | 12.5mm | 52x |
| Eyepiece 5 | 32mm | 20x |
| 2x Barlow lens | Doubles all magnifications | — |
| Moon filter | Reduces Moon brightness | — |
| Blue filter | Enhances Mars/Jupiter contrast | — |
| Green filter | Enhances lunar detail | — |
| Yellow filter | Enhances lunar/planetary contrast | — |
| Carry case | Foam-lined, all items fit | — |
💡 Compatibility:
All eyepieces and filters use the standard 1.25 inch barrel — compatible with virtually every telescope sold in the UK including all Sky-Watcher and Celestron models. Check your telescope accepts 1.25 inch eyepieces before buying (almost all do).
The Eyepieces — Tested
12.5mm Eyepiece (52x)
Best for: General observing — planets, lunar overview, globular clusters.
Quality: Good — solid all-rounder.
Verdict: ✅ Most-used eyepiece in our testing.
9mm Eyepiece (72x)
Best for: Planetary detail, lunar craters, double stars.
Quality: Good.
Verdict: ✅ Excellent for planets.
6mm Eyepiece (108x)
Best for: High-magnification planetary work on good nights.
Quality: Adequate — eye placement is tight.
Verdict: ⚠️ Use on steady nights only.
4mm Eyepiece (162x)
Best for: Maximum magnification on the Moon and planets.
Quality: Limited — very tight eye relief, only usable on excellent nights.
Verdict: ⚠️ Rarely usable from typical UK sites.
⚠️ High Magnification Reality:
The 4mm and 6mm eyepieces (108x and 162x) are only usable on nights of excellent atmospheric stability — rare in UK conditions. Most UK observing is done at 40-100x. The 32mm, 12.5mm, and 9mm eyepieces are the most useful in this kit.
The Filters — Tested
Moon Filter
Effect: Reduces Moon brightness to comfortable levels.
When to use: Any time the Moon is observed at 50x+ magnification.
Verdict: ✅ Genuinely useful — the Moon is very bright through 130mm+ telescopes.
Blue Filter (No. 80A)
Effect: Enhances contrast on Mars surface features and Jupiter cloud bands.
When to use: Mars and Jupiter at high magnification.
Verdict: ⚠️ Subtle effect — useful for experienced observers.
Green Filter (No. 56)
Effect: Enhances lunar contrast and some planetary features.
When to use: Moon and Mars.
Verdict: ⚠️ Similar to blue — subtle improvement.
Yellow Filter (No. 12)
Effect: Increases contrast on lunar features and reduces blue/violet fringing.
When to use: Moon observing.
Verdict: ✅ Most useful colour filter for UK observers — noticeably improves lunar contrast.
Who Should Buy This Kit?
YES — Buy if:
- You own a telescope and want more magnification options
- Budget for upgrades is under £60
- You want a Moon filter (included — worth £8 alone)
- Christmas or birthday gift for a telescope owner
- You want to try filters before buying individual premium ones
NO — Consider alternatives if:
- You want premium eyepiece quality → BST StarGuider 8mm (£45) outperforms the kit eyepieces individually
- You only need one eyepiece → Buy a single quality 10mm (£25-45)
- Deep-sky imaging is your goal → Different filters needed