Omegon #38A 2″ colour filter, dark blue
Looking for a way to get the most out of planetary observation? The Omegon #38A dark blue colour filter in 2″ size is a proven companion for every planetary observer. Thanks to its specific optical properties, it effectively suppresses red and orange wavelengths of light, significantly increasing the contrast of fine surface details on several planets in our solar system. If you regularly observe Jupiter, Mars, Saturn or Venus, this filter will open up a new perspective on their surfaces and atmospheres.
What can you observe with the #38A filter?
Jupiter
The dark blue #38A filter is one of the most popular choices among experienced observers of Jupiter. It strongly blocks red and orange components of the spectrum, making the atmospheric bands around the Great Red Spot stand out sharply. The contrast between individual cloud layers and characteristic structures increases noticeably - even smaller telescopes will reveal details that would otherwise blend into the surroundings.
Mars
On Mars, the #38A filter reliably helps in observing surface features and atmospheric phenomena such as dust storms. By suppressing warm colour tones, dark surface structures become easier to distinguish from the bright background.
Saturn
On Saturn, the filter contributes to increased contrast in the ring system, helping to distinguish individual gaps and structures within the rings.
Venus
As a filter for observing Venus, the #38A is particularly useful due to its low light transmission - it tames the brightness of this dazzlingly luminous planet to a comfortable level while bringing out subtle cloud formations in its atmosphere that are otherwise nearly invisible.
Practical use
The Omegon #38A 2″ colour filter features a standard 2″ thread and simply screws into your eyepiece - ready to use immediately. It is suitable for all experienced observers who want to extract as much detail as possible from their existing equipment when observing the planets of our solar system.
Key features
- Dark blue colour filter - Wratten type #38A
- Effective suppression of red and orange wavelengths
- Significantly improved contrast of planetary surface and atmospheric details
- Suitable for observing Jupiter, Mars, Saturn and Venus
- Standard 2″ thread - compatible with most eyepieces
- Ready to use - simply screws into the eyepiece barrel
| Parameter |
Value |
| Filter type |
Colour filter, dark blue |
| Wratten designation |
#38A |
| Size |
2″ |
| Thread |
Standard 2″ eyepiece thread |
| Recommended planets |
Jupiter, Mars, Saturn, Venus |
