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Small black threaded filter ring 1.25 inch

Celestron

Celestron UHC/LPR Filter 1.25

SKU CH-8J7H-7XK0B

A 1.25" UHC/LPR filter that blocks light-pollution wavelengths while transmitting over 97% of nebula emissions for darker skies and higher contrast

  • Reduces artificial light pollution for darker skies
  • Over 97% light transmission across the bandpass
  • Ultra-high contrast reveals emission nebulae clearly
  • Blocks mercury and sodium vapor wavelengths
  • 25 inch thread fits standard telescope eyepieces

Celestron UHC/LPR Filter 1.25

The Celestron 1.25" UHC/LPR Filter is a premium optical accessory designed to improve telescope views by blocking artificial light pollution. It selectively reduces wavelengths from mercury and sodium vapour lamps as well as natural oxygen glow. Advanced coatings deliver over 97% light transmission across the bandpass for a darker sky background.

Urban and rural astronomers seeking nebula contrast

Observers under light-polluted skies will benefit from the filter’s ability to suppress unwanted wavelengths and reveal emission nebulae. Rural users wanting maximum contrast on deep-sky objects also gain an advantage. Visual observers who only view the Moon, planets or star clusters will not see an improvement and should look elsewhere.

1.25 inch threaded fit for standard eyepieces

The 1.25 inch thread matches common telescope eyepieces and diagonals, so the filter installs without adapters. It comfortably handles emission-line targets such as planetary and diffuse nebulae by isolating their key wavelengths. Broadband targets like galaxies and reflection nebulae receive less benefit because their light spans the blocked bands.

How it compares

Measured against everything we stock in Binoculars, Scopes & Sights, at today’s prices. Recalculated every night.

Price $77.99
Cheaper than about 55% of the 1,401 comparable items (median $93.99).

Specifications

No published specifications for this item yet.

Questions about this item

What telescope eyepiece size does the 1.25 inch thread fit?

The 1.25 inch thread screws directly into any standard 1.25 inch telescope eyepiece or diagonal barrel.

Does the over 97% transmission coating change the colour balance of stars or galaxies?

The coating blocks mercury and sodium vapour lines plus neutral oxygen glow while passing the nebula emission bands, so star colours stay natural and nebulae gain contrast.

How can I confirm the filter is darkening the sky background as intended?

Point the telescope at a bright suburban sky; the background should appear noticeably darker while the Orion Nebula or similar emission nebulae show stronger contrast against it.

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