They pass the lines the gas emits and block the rest · review
SVBONY's 1.25-inch UHC filter (FUSF9131A): optical glass in an aluminum frame with a standard thread, sold to darken the sky background and raise the contrast of emission nebulae, with no wavelengths published.
SVBONY’s 1.25-inch UHC filter, model FUSF9131A, has optical glass in an aluminum frame and a standard filter thread, and comes in a sturdy clear case. The listing says the sky background darkens and emission nebulae gain contrast, from light-polluted skies or dark ones, and that it can be used for photography as well.
No wavelengths, no transmission, no coating description. Like most UHC filters at this price, it cannot be compared on paper with another. See narrowband filter names.
Emission and planetary nebulae. Not galaxies, not clusters. For oxygen-rich targets like the Veil, an OIII such as Celestron’s gives more contrast and publishes its lines.
On November 7, 2026, Amazon.com listed it at about $29 from a third-party seller.
Figures as Keepa reported them on the day this page was last updated. Stock and pricing shift without warning.
Prices quoted in this text were read on November 7, 2026. The live price is at the top of the page.
Same aisle, closest price — what the same spend else shows.
| Bandpass and type | UHC, a convention rather than a standard · no wavelengths published |
|---|---|
| Line transmission | Not published by the maker. |
| Blocking outside the band | Stated to reduce light from artificial sources; no figures |
| Thread size | 1.25 in standard filter thread |
| Glass flatness | Not published by the maker. |
| Coatings | Not described · optical glass in an aluminum frame · clear storage case |
| Amazon reference | B06XKRSH6X |
Emission nebulae such as Orion, the Lagoon and the Swan, and planetary nebulae, against a darker sky. Galaxies and star clusters do not benefit.
Any 1.25-inch eyepiece or accessory with a standard filter thread.
On paper they cannot be compared: neither publishes wavelengths. SVBONY's is a known brand with a clear case.
7.0/ 10
A standard 1.25-inch UHC filter that does what UHC filters do and publishes no number to compare it by.
This model is listed on Amazon.com, at ≈ $29 at the last reading. Listed is not the same as in stock: availability changes daily, and the buy box shows the live price.
Details checked on November 7, 2026.
A first, inexpensive UHC filter for a 1.25 in eyepiece, tried on emission nebulae from a suburban sky
Listed because the eyepiece or part names this scope.
Amazon reports what buyers took in the month before this page was last checked: at least 50.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for telescopes and observing optics and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
UHC · M28.5 × 0.6 thread · aluminum alloy frame · waterproof coating · no passband published
Aerbeis's 1.25-inch UHC filter: high-transparency optical glass in an aluminum alloy frame with a standard M28.5 × 0.6 thread and a waterproof coating, sold for emission nebulae from light-polluted skies.
Best for: A first nebula filter for a light-polluted sky, bought on price with the specification taken on trust
≈ $23
H-alpha narrowband · 1.25 in · hardened multi-coatings · for imaging H-II regions · no bandwidth published
Astromania's 1.25-inch H-alpha narrowband filter, sold for high-contrast imaging of hydrogen regions and as an extreme anti-light-pollution filter, with hardened multi-coatings and no published bandwidth.
Best for: Imaging hydrogen regions, by someone who will ask the seller for the bandwidth before buying
≈ $70
UHC · 1.25 in standard thread · optical glass in an aluminum frame · anti-reflection coatings · no passband published
Astromania's 1.25-inch UHC filter: optical glass in an aluminum frame with anti-reflection coatings and a standard thread, sold for the Orion, Lagoon and Swan nebulae from city and dark skies alike.
Best for: An observer in a suburban sky who wants the effect explained before buying
≈ $27
