Omegon #21 orange filter 2″
If you want to get the most out of visual planetary observation, color filters are among the simplest and most effective tools available. The Omegon #21 filter in orange belongs to the Basic series and is intended exclusively for visual use - simply screw it into the eyepiece drawtube or into any eyepiece with a standard 2″ thread, and the results are immediately apparent.
What does the orange #21 filter reveal?
The number 21 orange filter is a classic choice, particularly for observing Mars and Jupiter. On Mars, it significantly enhances surface details - dark regions and albedo features stand out clearly thanks to the suppression of blue and green wavelengths. On Jupiter, the filter helps distinguish atmospheric bands and zones and highlights areas of differing temperature and composition. This type of color filter for visual planetary observation is also well suited for Saturn, where it can improve the visibility of atmospheric band structures.
The filter works on the principle of selective transmission - it passes predominantly the red and orange parts of the spectrum while attenuating shorter wavelengths, thereby increasing contrast between different types of surface or atmospheric features.
Construction and compatibility
The filter body is made from aluminum, ensuring low weight, good mechanical durability, and reliable retention in the eyepiece. The thread conforms to the standard 2″ size, so the filter is compatible with all eyepieces and accessories of this diameter. The aluminum thread eliminates the risk of damage during normal use, and the filter can be safely transported without concern about deformation.
Who is this filter for?
The Omegon #21 2″ orange filter is appreciated by anyone dedicated to visual planetary observation - whether a beginner who wants to see Martian surface details for the first time, or an experienced observer looking to add a proven orange filter to their color filter set.
Important things to keep in mind:
- This filter is intended exclusively for visual use
- It is not suitable for astrophotography
- It is not designed for observing nebulae or other deep-sky objects
- Its domain is planets observed visually at the eyepiece
Omegon Basic series
The Omegon Basic filter series is focused on accessibility without unnecessary compromises in core functionality - suitable for both beginners and experienced observers who want a reliable filter at a reasonable price. The Omegon brand was created with the goal of offering astronomers - from beginners to seasoned observers - quality equipment across a wide range of categories. The product range includes telescopes, mounts, eyepieces, filters, and various accessories, with each product carefully selected to meet the real needs of astronomers.
Filter specifications
| Parameter |
Value |
| Filter number |
#21 |
| Color |
Orange |
| Thread size |
2″ |
| Body material |
Aluminum |
| Transmission |
Red and orange spectrum (suppresses blue and green wavelengths) |
| Intended use |
Visual observation of planets |
| Series |
Omegon Basic |
| Recommended objects |
Mars, Jupiter, Saturn |
The Omegon Basic series proves that quality astronomical optics and accessories do not have to be out of reach - delivering tested, functional solutions without unnecessary price inflation, so that anyone who wants to improve their observing results can afford them.
