Focus Scientific

Celestron UHC Nebula Filter (1.25\")

Enhances contrast of emission Nebulae by rejecting light pollution from unwanted regions of the visible spectrum. Nebulae will be easier to see, as the sky is darkened.

Advanced dielectric multi-layer coatings are plasma-assisted and ion-beam hardened using the latest technology for durability and scratch resistance. This UHC filter achieves over 97% transmission across the entire bandpass, with sharp cutoffs, and total blockage of prominent light pollution lines.

Nebula filters are useful in and out of the city.


  • Passes:
    • Hydrogen Beta (486.1nm wavelength)
    • Doubly ionized Oxygen-III (500.7nm and 495.9nm wavelengths)
    • Hydrogen Alpha (656.3nm wavelength)
  • Made in Germany
  • Fits 1.25" optics

This filter is also available in a 2" format.