Omegon #23A 2″ colour filter, light red
If you are looking for a reliable and affordable colour filter for visual observation of planets and the Moon, the Omegon #23A in light red is an excellent choice. It belongs to the Basic series from Omegon and is designed for anyone who wants to get a little more out of their telescope - without unnecessary complexity and with an immediate effect during observation.
How the light red #23A filter works
The light red #23A filter works on the principle of selective light transmission - it passes red components of the spectrum while suppressing blue and green wavelengths. During visual observation of Mars, it enhances surface details and dark albedo structures. On Jupiter, it helps distinguish cloud bands and reduces colour noise caused by atmospheric turbulence. The Moon gains a pleasant contrast when viewed through this filter, without losing detail in crater fields. The filter is designed exclusively for visual telescope observation and is not primarily intended for astrophotography.
Construction and compatibility
The filter frame is made from aluminium, ensuring low weight while maintaining sufficient mechanical durability. The thread matches the standard 2″ format, so the filter fits easily into most eyepieces and finders with a 2″ thread. Installation takes only a few seconds - simply screw the filter into the eyepiece adapter or directly into the eyepiece barrel. The Omegon Basic series focuses on accessibility and practicality, making this 2″ colour filter for telescopes a good choice for beginners and more experienced visual observers looking for a cost-effective addition to their kit.
Who is this filter for?
The Omegon #23A is an ideal choice for planetary observers who want to gently enhance surface details on solar system planets without investing in specialised narrowband filters. It also works well as a first step into the world of filter optics - thanks to its simple operation and standard 2″ thread, it is compatible with the vast majority of available eyepieces. Whether you have a refractor, a Newtonian or a catadioptric telescope with a 2″ focuser, this filter for visual planetary observation will integrate seamlessly into your setup.
Suitable for observing
- Mars - enhanced surface details and albedo structures
- Jupiter - improved visibility of cloud bands, reduced atmospheric blur
- The Moon - increased contrast without loss of crater detail
About the Omegon Basic series
Omegon is a brand with a clear focus on astronomy enthusiasts - from beginners to experienced observers. Their products emphasise practicality, accessibility and solid build quality. The Basic series offers a straightforward approach to filter optics without unnecessary premiums for unused features. Omegon offers a wide range of astronomy accessories, so you can easily find compatible eyepieces, adapters and other equipment from the same product line to complement this filter.
Technical specifications
| Parameter |
Value |
| Filter designation |
#23A light red |
| Thread size |
2″ |
| Frame material |
Aluminium |
| Intended use |
Visual observation |
| Series |
Omegon Basic |
| Primary application |
Planets and Moon |
