Omegon Pro 2″ UHC Filter

Omegon Pro 2″ UHC filter

You know the feeling - you look through the eyepiece, you know there is something out there, but the object simply disappears into the background of the night sky. The Omegon Pro UHC filter was made exactly for moments like these. Screw it into your eyepiece and a nebula that was barely flickering on the edge of visibility a moment ago suddenly appears with surprising clarity and structure. No magic - just smart optical technology.

How the UHC filter works

UHC (Ultra High Contrast) is a filter that works on the principle of selective light transmission. It suppresses unwanted parts of the spectrum - especially light pollution from artificial city lighting and natural airglow - while passing the wavelengths characteristic of emission nebulae: primarily the H-beta line (486 nm) and the OIII doublet (496 and 501 nm).

The result is a dramatic increase in contrast between the object and the sky background. The filter does darken the overall image slightly, so it is recommended for telescopes with an objective diameter of 100 mm and above, where the light loss does not present a problem.

The most versatile nebula filter

The UHC filter is considered one of the most universal astronomical filters available. Unlike narrowband filters such as OIII or H-alpha, it passes a wider portion of the spectrum, which makes it work well across an entire class of objects - from emission and planetary nebulae to supernova remnants.

If you are just starting out with filter observation and want a single filter that covers as many objects as possible, the UHC is the natural first choice.

What you can observe with the Omegon Pro UHC filter

Spectacular results can be achieved for example with the Orion Nebula (M42), which is visibly larger with the UHC filter than you would expect - finer structures and more extensive edges are revealed that would otherwise be lost in the background. The filter also excels on many other objects, including:

• Emission nebulae - extended glowing clouds of ionised hydrogen and oxygen
• Planetary nebulae - compact shells of gas around dying stars
• Supernova remnants - large, faint structures requiring strong contrast enhancement

For each of these objects the filter suppresses the background light noise and enhances the emitted light of ionised hydrogen and oxygen that forms the glow of the nebula. The result is detail that remains hidden to the eye without a filter - even when observing from suburban locations with partial light pollution.

Quality and compatibility

Omegon Pro filters are designed with an emphasis on precise workmanship and optical quality appreciated by both beginners and experienced astronomers. Key features include:

• Precisely ground optical glass
• Durable multi-layer coatings with high resistance to wear
• Standard 2″ thread ensuring compatibility with the vast majority of eyepieces on the market
• Compact dimensions for easy transport
• Direct threading into the eyepiece - no adapters required

The Omegon Pro series provides a reliable foundation for everyone who wants to get the most out of observing deep-sky objects.

Technical specifications