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.

Specifications

• 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.